Variables: Difference between revisions
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<code>[[Variables#BDmRange|BDmRange]]</code> <code>[[Variables#BEnRange|BEnRange]]</code> <code>[[Variables#BEnSteps|BEnSteps]]</code> <code>[[Variables#BLongDir|BLongDir]]</code> <code>[[Variables#BndsRnXd|BndsRnXd]]</code> <code>[[Variables#BndsRnXp|BndsRnXp]]</code> <code>[[Variables#BoseCut|BoseCut]]</code> <code>[[Variables#BoseTemp|BoseTemp]]</code> <br> | <code>[[Variables#BDmRange|BDmRange]]</code> <code>[[Variables#BEnRange|BEnRange]]</code> <code>[[Variables#BEnSteps|BEnSteps]]</code> <code>[[Variables#BLongDir|BLongDir]]</code> <code>[[Variables#BndsRnXd|BndsRnXd]]</code> <code>[[Variables#BndsRnXp|BndsRnXp]]</code> <code>[[Variables#BoseCut|BoseCut]]</code> <code>[[Variables#BoseTemp|BoseTemp]]</code> <br> | ||
<code>[[Variables#BS_CPU|BS_CPU]]</code> <code>[[Variables#BS_nCPU_LinAlg_DIAGO|BS_nCPU_LinAlg_DIAGO]]</code> <code>[[Variables#BS_nCPU_LinAlg_INV|BS_nCPU_LinAlg_INV]]</code> <code>[[Variables#BS_ROLEs|BS_ROLEs]]</code> <code>[[Variables#bse|bse]]</code> <code>[[Variables#BSEBands|BSEBands]]</code> <code>[[Variables#BSEmod|BSEmod]]</code> <code>[[Variables#BSENGBlk|BSENGBlk]]</code> <br> | <code>[[Variables#BS_CPU|BS_CPU]]</code> <code>[[Variables#BS_nCPU_LinAlg_DIAGO|BS_nCPU_LinAlg_DIAGO]]</code> <code>[[Variables#BS_nCPU_LinAlg_INV|BS_nCPU_LinAlg_INV]]</code> <code>[[Variables#BS_ROLEs|BS_ROLEs]]</code> <code>[[Variables#bse|bse]]</code> <code>[[Variables#BSEBands|BSEBands]]</code> <code>[[Variables#BSEmod|BSEmod]]</code> <code>[[Variables#BSENGBlk|BSENGBlk]]</code> <br> | ||
<code>[[Variables#BSENGexx|BSENGexx]]</code> <code>[[Variables#BSEPSInvTrs|BSEPSInvTrs]]</code> <code>[[Variables#BSHayTrs|BSHayTrs]]</code> <code>[[Variables#bsk|bsk]]</code> <code>[[Variables#BSKmod|BSKmod]]</code> <code>[[Variables# | <code>[[Variables#BSENGexx|BSENGexx]]</code> <code>[[Variables#BSEPSInvTrs|BSEPSInvTrs]]</code> <code>[[Variables#BSHayTrs|BSHayTrs]]</code> <code>[[Variables#bsk|bsk]]</code> <code>[[Variables#BSKmod|BSKmod]]</code> <code>[[Variables#bss|bss]]</code> <code>[[Variables#BSSInvKdiag|BSSInvKdiag]]</code> <code>[[Variables#BSSInvMode|BSSInvMode]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#BSSInvPFratio|BSSInvPFratio]]</code> <code>[[Variables#BSSmod|BSSmod]]</code> <code>[[Variables#BSSPertWidth |BSSPertWidth ]]</code> <code>[[Variables#CGrdSpXd|CGrdSpXd]]</code> <code>[[Variables#chi|chi]]</code> <code>[[Variables#ChiLinAlgMod|ChiLinAlgMod]]</code> <code>[[Variables#Chimod|Chimod]]</code> <code>[[Variables#cohsex|cohsex]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#CUTBox|CUTBox]]</code> <code>[[Variables#CUTCol_test|CUTCol_test]]</code> <code>[[Variables#CUTCylLen|CUTCylLen]]</code> <code>[[Variables#CUTGeo|CUTGeo]]</code> <code>[[Variables#CUTRadius|CUTRadius]]</code> <code>[[Variables#CUTwsGvec|CUTwsGvec]]</code> <code>[[Variables#DbGdQsize|DbGdQsize]]</code> <code>[[Variables#DbGdQsize|DbGdQsize]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#DBsFRAGpm|DBsFRAGpm]]</code> <code>[[Variables#DBsIOoff|DBsIOoff]]</code> <code>[[Variables#DIP_Threads|DIP_Threads]]</code> <code>[[Variables#DipApproach|DipApproach]]</code> <code>[[Variables#DipApproach|DipApproach]]</code> <code>[[Variables#DipPDirect|DipPDirect]]</code> <code>[[Variables#DipPDirect|DipPDirect]]</code> <code>[[Variables#DmERefXd|DmERefXd]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#DmRngeXd|DmRngeXd]]</code> <code>[[Variables#DmRngeXp|DmRngeXp]]</code> <code>[[Variables#DrClassic|DrClassic]]</code> <code>[[Variables#DrudeWBS|DrudeWBS]]</code> <code>[[Variables#DrudeWXd|DrudeWXd]]</code> <code>[[Variables#dScStep|dScStep]]</code> <code>[[Variables#DysSolver|DysSolver]]</code> <code>[[Variables#EhEngyXd|EhEngyXd]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#ElecTemp|ElecTemp]]</code> <code>[[Variables#Em1Anys|Em1Anys]]</code> <code>[[Variables#em1d|em1d]]</code> <code>[[Variables#em1s|em1s]]</code> <code>[[Variables#EMStpsXd|EMStpsXd]]</code> <code>[[Variables#EnRngeXd|EnRngeXd]]</code> <code>[[Variables#EnRngeXp|EnRngeXp]]</code> <code>[[Variables#ETStpsXd|ETStpsXd]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#ETStpsXp|ETStpsXp]]</code> <code>[[Variables#EvalCurrent|EvalCurrent]]</code> <code>[[Variables#ExtendOut |ExtendOut ]]</code> <code>[[Variables#ExtF_Dir|ExtF_Dir]]</code> <code>[[Variables#ExtF_kind|ExtF_kind]]</code> <code>[[Variables#EXXRLvcs|EXXRLvcs]]</code> <code>[[Variables#EXXRLvcs|EXXRLvcs]]</code> <code>[[Variables#FFTGvecs|FFTGvecs]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#FrSndOrd|FrSndOrd]]</code> <code>[[Variables#FxcGRLc|FxcGRLc]]</code> <code>[[Variables#Gauge|Gauge]]</code> <code>[[Variables#GbndRnge|GbndRnge]]</code> <code>[[Variables#GDamping|GDamping]]</code> <code>[[Variables#GDmRnge|GDmRnge]]</code> <code>[[Variables#GEnRnge|GEnRnge]]</code> <code>[[Variables#GEnSteps|GEnSteps]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#GfnQP_E|GfnQP_E]]</code> <code>[[Variables#GfnQP_N|GfnQP_N]]</code> <code>[[Variables#GfnQP_Wc|GfnQP_Wc]]</code> <code>[[Variables#GfnQP_Wc_dos|GfnQP_Wc_dos]]</code> <code>[[Variables#GfnQP_Wc_E|GfnQP_Wc_E]]</code> <code>[[Variables#GfnQP_Wv|GfnQP_Wv]]</code> <code>[[Variables#GfnQP_Wv_dos|GfnQP_Wv_dos]]</code> <code>[[Variables#GfnQP_Wv_E|GfnQP_Wv_E]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#GfnQP_Z|GfnQP_Z]]</code> <code>[[Variables#GfnQPdb|GfnQPdb]]</code> <code>[[Variables#GrFnTpXd|GrFnTpXd]]</code> <code>[[Variables#GTermEn|GTermEn]]</code> <code>[[Variables#GTermKind|GTermKind]]</code> <code>[[Variables#gw0|gw0]]</code> <code>[[Variables#HARRLvcs|HARRLvcs]]</code> <code>[[Variables#HF_and_locXC|HF_and_locXC]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#IDEm1Ref|IDEm1Ref]]</code> <code>[[Variables#IkSigLim|IkSigLim]]</code> <code>[[Variables#IkXLim|IkXLim]]</code> <code>[[Variables#K_Threads|K_Threads]]</code> <code>[[Variables#KfnQP_E|KfnQP_E]]</code> <code>[[Variables#KfnQP_N|KfnQP_N]]</code> <code>[[Variables#KfnQP_Wc|KfnQP_Wc]]</code> <code>[[Variables#KfnQP_Wc_dos|KfnQP_Wc_dos]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#KfnQP_Wc_E|KfnQP_Wc_E]]</code> <code>[[Variables#KfnQP_Wv|KfnQP_Wv]]</code> <code>[[Variables#KfnQP_Wv_dos|KfnQP_Wv_dos]]</code> <code>[[Variables#KfnQP_Wv_E|KfnQP_Wv_E]]</code> <code>[[Variables#KfnQP_Z|KfnQP_Z]]</code> <code>[[Variables#KfnQPdb|KfnQPdb]]</code> <code>[[Variables#life |life ]]</code> <code>[[Variables#LifeTrCG|LifeTrCG]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#LongDrXd|LongDrXd]]</code> <code>[[Variables#LongDrXp|LongDrXp]]</code> <code>[[Variables#LRC_alpha|LRC_alpha]]</code> <code>[[Variables#MaxGvecs|MaxGvecs]]</code> <code>[[Variables#MEM_tresh|MEM_tresh]]</code> <code>[[Variables#MetDamp|MetDamp]]</code> <code>[[Variables#Nelectro|Nelectro]]</code> <code>[[Variables#NewtDchk|NewtDchk]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#NGsBlkXd|NGsBlkXd]]</code> <code>[[Variables#NLBands|NLBands]]</code> <code>[[Variables#NLCorrelation |NLCorrelation ]]</code> <code>[[Variables#NLDamping|NLDamping]]</code> <code>[[Variables#NLintegrator|NLintegrator]]</code> <code>[[Variables#NLLrcAlpha|NLLrcAlpha]]</code> <code>[[Variables#NLogCPUs|NLogCPUs]]</code> <code>[[Variables#nloptics|nloptics]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#NLstep|NLstep]]</code> <code>[[Variables#NLtime|NLtime]]</code> <code>[[Variables#NLverbosity|NLverbosity]]</code> <code>[[Variables#NoCondSumRule|NoCondSumRule]]</code> <code>[[Variables#NonPDirs|NonPDirs]]</code> <code>[[Variables#OccTresh|OccTresh]]</code> <code>[[Variables#OnMassShell |OnMassShell ]]</code> <code>[[Variables#optics|optics]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#PAR_def_mode|PAR_def_mode]]</code> <code>[[Variables#PAR_def_mode|PAR_def_mode]]</code> <code>[[Variables#PPAPntXp|PPAPntXp]]</code> <code>[[Variables#Qdirection|Qdirection]]</code> <code>[[Variables#QPerange|QPerange]]</code> <code>[[Variables#QPerange|QPerange]]</code> <code>[[Variables#QpgFull|QpgFull]]</code> <code>[[Variables#QPkrange|QPkrange]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#QPkrange|QPkrange]]</code> <code>[[Variables#QpntsRXd|QpntsRXd]]</code> <code>[[Variables#QptCoord|QptCoord]]</code> <code>[[Variables#QShiftOrder|QShiftOrder]]</code> <code>[[Variables#RandGvec|RandGvec]]</code> <code>[[Variables#RandQpts|RandQpts]]</code> <code>[[Variables#Reflectivity|Reflectivity]]</code> <code>[[Variables#rim_cut|rim_cut]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#SE_CPU|SE_CPU]]</code> <code>[[Variables#SE_ROLEs|SE_ROLEs]]</code> <code>[[Variables#SE_Threads|SE_Threads]]</code> <code>[[Variables#setup|setup]]</code> <code>[[Variables#ShiftedPaths|ShiftedPaths]]</code> <code>[[Variables#ShiftedPaths|ShiftedPaths]]</code> <code>[[Variables#StdoHash|StdoHash]]</code> <code>[[Variables#tddft|tddft]]</code> <br> | ||
<code>[[Variables# | <code>[[Variables#UseDipoles|UseDipoles]]</code> <code>[[Variables#UseNLCC|UseNLCC]]</code> <code>[[Variables#VXCRLvcs|VXCRLvcs]]</code> <code>[[Variables#WehCpl|WehCpl]]</code> <code>[[Variables#WehDiag|WehDiag]]</code> <code>[[Variables#WFbuffIO|WFbuffIO]]</code> <code>[[Variables#WRbsWF|WRbsWF]]</code> <code>[[Variables#X_all_q_CPU|X_all_q_CPU]]</code> <br> | ||
<code>[[Variables#XfnQP_N|XfnQP_N]]</code> <code>[[Variables#XfnQP_Wc|XfnQP_Wc]]</code> <code>[[Variables#XfnQP_Wc_dos|XfnQP_Wc_dos]]</code> <code>[[Variables#XfnQP_Wc_E|XfnQP_Wc_E]]</code> <code>[[Variables#XfnQP_Wv|XfnQP_Wv]]</code> <code>[[Variables#XfnQP_Wv_dos|XfnQP_Wv_dos]]</code> <code>[[Variables#XfnQP_Wv_E|XfnQP_Wv_E]]</code> <code>[[Variables#XfnQP_Z|XfnQP_Z]]</code> | <code>[[Variables#X_all_q_nCPU_LinAlg_INV|X_all_q_nCPU_LinAlg_INV]]</code> <code>[[Variables#X_all_q_ROLEs|X_all_q_ROLEs]]</code> <code>[[Variables#X_finite_q_CPU|X_finite_q_CPU]]</code> <code>[[Variables#X_finite_q_nCPU_LinAlg_INV|X_finite_q_nCPU_LinAlg_INV]]</code> <code>[[Variables#X_finite_q_ROLEs|X_finite_q_ROLEs]]</code> <code>[[Variables#X_q_0_CPU|X_q_0_CPU]]</code> <code>[[Variables#X_q_0_nCPU_LinAlg_INV|X_q_0_nCPU_LinAlg_INV]]</code> <code>[[Variables#X_q_0_ROLEs|X_q_0_ROLEs]]</code> <br> | ||
<code>[[Variables#XfnQPdb|XfnQPdb]]</code> <br> | <code>[[Variables#X_Threads|X_Threads]]</code> <code>[[Variables#XfnQP_E|XfnQP_E]]</code> <code>[[Variables#XfnQP_N|XfnQP_N]]</code> <code>[[Variables#XfnQP_Wc|XfnQP_Wc]]</code> <code>[[Variables#XfnQP_Wc_dos|XfnQP_Wc_dos]]</code> <code>[[Variables#XfnQP_Wc_E|XfnQP_Wc_E]]</code> <code>[[Variables#XfnQP_Wv|XfnQP_Wv]]</code> <code>[[Variables#XfnQP_Wv_dos|XfnQP_Wv_dos]]</code> <br> | ||
<code>[[Variables#XfnQP_Wv_E|XfnQP_Wv_E]]</code> <code>[[Variables#XfnQP_Z|XfnQP_Z]]</code> <code>[[Variables#XfnQPdb|XfnQPdb]]</code> <br> | |||
===Global options=== | ===Global options=== | ||
<span id=Nelectro></span> | <span id=Nelectro></span> | ||
{{var-basic|Nelectro|None|}}{{var-default|From ns.db1}}{{var-verbosity|gen}} | {{var-basic|Nelectro|None|Real}}{{var-default|From ns.db1}}{{var-verbosity|gen}} | ||
{{var-short| | {{var-short|Number of electrons}} | ||
{{var-usage|}} | {{var-usage|Change to shift the Fermi level by hand.}} | ||
<span id=ElecTemp></span> | <span id=ElecTemp></span> | ||
{{var-basic|ElecTemp||}}{{var-verbosity|gen}} | {{var-basic|ElecTemp|Energy|Real}}{{var-default|0.000}}{{var-verbosity|gen}} | ||
{{var-short|Electronic Temperature}} | {{var-short|Electronic Temperature}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BoseTemp></span> | <span id=BoseTemp></span> | ||
{{var-basic|BoseTemp||}}{{var-verbosity|gen}} | {{var-basic|BoseTemp|Energy|Real}}{{var-default|-1}}{{var-verbosity|gen}} | ||
{{var-short|Bosonic Temperature}} | {{var-short|Bosonic Temperature}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=OccTresh></span> | <span id=OccTresh></span> | ||
{{var-basic|OccTresh||}}{{var-verbosity|gen}} | {{var-basic|OccTresh|None|Real}}{{var-default|1.00E-05}}{{var-verbosity|gen}} | ||
{{var-short|Occupation treshold (metallic bands)}} | {{var-short|Occupation treshold (metallic bands)}} | ||
{{var-usage|}} | {{var-usage|}} | ||
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{{var-usage|Might be useful to increase for very long jobs, or if the code is hanging.}} | {{var-usage|Might be useful to increase for very long jobs, or if the code is hanging.}} | ||
<span id=DBsIOoff></span> | <span id=DBsIOoff></span> | ||
{{var-basic|DBsIOoff|None|String}}{{var-default| | {{var-basic|DBsIOoff|None|String}}{{var-default|none}}{{var-verbosity|io}} | ||
{{var-short|List of databases not written to disk}} | {{var-short|List of databases not written to disk}} | ||
{{var-usage|Space-separated list of DB with NO I/O. DB is (DIP,X,HF,COLLs,J,GF,CARRIERs,OBS,W,SC,BS,ALL). No ndb.* file is written. }} | {{var-usage|Space-separated list of DB with NO I/O. DB is (DIP,X,HF,COLLs,J,GF,CARRIERs,OBS,W,SC,BS,ALL). No ndb.* file is written. }} | ||
::Example: DBsIOoff= "DIP" means ndb.dip_iR_and_P_fragment_* is not written, but stored in memory if Yambo needs it. | ::Example: DBsIOoff= "DIP" means ndb.dip_iR_and_P_fragment_* is not written, but stored in memory if Yambo needs it. | ||
<span id=DBsFRAGpm></span> | <span id=DBsFRAGpm></span> | ||
{{var-basic|DBsFRAGpm|None|String}}{{var-default| | {{var-basic|DBsFRAGpm|None|String}}{{var-default|none}}{{var-verbosity|io}} | ||
{{var-short|List of databases to be fragmented}} | {{var-short|List of databases to be fragmented}} | ||
{{var-usage|Space-separated list of +DB to FRAG and -DB to NOT FRAG, where DB is (DIP,X,W,HF,COLLS,K,BS,QINDX,RT,ELP. Fragments the database. Smaller files (e.g. ndb.em1s_fragment_*) are created instead of a large one (e.g. ndb.em1s). Faster read/write operations in parallel runs}} | {{var-usage|Space-separated list of +DB to FRAG and -DB to NOT FRAG, where DB is (DIP,X,W,HF,COLLS,K,BS,QINDX,RT,ELP. Fragments the database. Smaller files (e.g. ndb.em1s_fragment_*) are created instead of a large one (e.g. ndb.em1s). Faster read/write operations in parallel runs}} | ||
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{{var-usage|Parts of the WFs are stored by the node. Nodes communicate when these elements are needed. Memory heavy.}} | {{var-usage|Parts of the WFs are stored by the node. Nodes communicate when these elements are needed. Memory heavy.}} | ||
<span id=MEM_tresh></span> | <span id=MEM_tresh></span> | ||
{{var-basic|MEM_tresh| | {{var-basic|MEM_tresh|Kb|Integer}}{{var-default|10000}}{{var-verbosity|gen}} | ||
{{var-short|Threshold on traced memory allocations/deallocations}} | {{var-short|Threshold on traced memory allocations/deallocations}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=NLogCPUs></span> | <span id=NLogCPUs></span> | ||
{{var-basic|NLogCPUs|None|}}{{var-verbosity|par}} | {{var-basic|NLogCPUs|None|Integer}}{{var-verbosity|par}} | ||
{{var-short|}} | {{var-short|Live-timing CPU`s (0 for all)}} | ||
{{var-usage|}} | {{var-usage|Number of CPUs that write a LOG file. 0 means all CPUs.}} | ||
<span id=PAR_def_mode></span> | <span id=PAR_def_mode></span> | ||
{{var-basic|PAR_def_mode|None|}}{{var-verbosity|par}} | {{var-basic|PAR_def_mode|None|String}}{{var-default|balanced}}{{var-verbosity|par}} | ||
{{var-short|}} | {{var-short|Parallelization mode ("balanced"/"memory"/"workload")}} | ||
{{var-usage|}} | {{var-usage|You can set "memory" to save memory}} | ||
<span id=FFTGvecs></span> | <span id=FFTGvecs></span> | ||
{{var-basic|FFTGvecs|RL/Energy|Integer/Real}}{{var-verbosity|RL}} | {{var-basic|FFTGvecs|RL/Energy|Integer/Real}}{{var-verbosity|RL}} | ||
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===Initialization=== | ===Initialization=== | ||
<span id=setup></span> | <span id=setup></span> | ||
{{var-basic|setup||String}} | {{var-basic|setup|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name}} | ||
{{var-usage|}} | {{var-usage|Activate with -i option}} | ||
<span id=MaxGvecs></span> | <span id=MaxGvecs></span> | ||
{{var-basic|MaxGvecs|RL/Energy|Integer/Real}}{{var-verbosity|RL}} | {{var-basic|MaxGvecs|RL/Energy|Integer/Real}}{{var-verbosity|RL}} | ||
Line 121: | Line 122: | ||
===Random integration method and cutoff Coulomb potentials=== | ===Random integration method and cutoff Coulomb potentials=== | ||
<span id=rim_cut></span> | <span id=rim_cut></span> | ||
{{var-basic|rim_cut||String}} | {{var-basic|rim_cut|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name}} | ||
{{var-usage|}} | {{var-usage|Activate with -r option}} | ||
<span id=RandQpts></span> | <span id=RandQpts></span> | ||
{{var-basic|RandQpts|RL|Integer}} | {{var-basic|RandQpts|RL|Integer}} | ||
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{{var-usage|It needs convergence: values like 10^6 can be used to ensure convergence. Needed for non 3D system to avoid divergences for small q, and needed to build cutoff potential with box shape}} ''See also:'' <code>[[Variables#RandGvec|RandGvec]]</code> | {{var-usage|It needs convergence: values like 10^6 can be used to ensure convergence. Needed for non 3D system to avoid divergences for small q, and needed to build cutoff potential with box shape}} ''See also:'' <code>[[Variables#RandGvec|RandGvec]]</code> | ||
<span id=CUTGeo></span> | <span id=CUTGeo></span> | ||
{{var-basic|CUTGeo|None|String}} | {{var-basic|CUTGeo|None|String}}{{var-default|none}} | ||
{{var-short|Cutoff geometry}} | {{var-short|Cutoff geometry}} | ||
{{var-usage|Allowed values are: "box/cylinder/sphere/ws X/Y/Z/XY...", e.g. "box xy" or "cylinder y". WS is the suggested option for orthorhombic cells. Use sphere (0D) for molecules, cylinder (1D) for polymers and nanotubes, box (0D, 1D, 2D) for all geometries. XYZ: cut in all directions. Box: XY: cut in XY only. Cylinder X/Y/Z indicates cylinder axis. When using Box shapes, the RIM is also needed to calculate the potential. In Box for large enough boxes assigns Box side slighlty smaller than the cell box}} ''See also:'' <code>[[Variables#CUTBox/CUTRadius/CUTCylLen/CUTwsGvec| | {{var-usage|Allowed values are: "box/cylinder/sphere/ws X/Y/Z/XY...", e.g. "box xy" or "cylinder y". WS is the suggested option for orthorhombic cells. Use sphere (0D) for molecules, cylinder (1D) for polymers and nanotubes, box (0D, 1D, 2D) for all geometries. XYZ: cut in all directions. Box: XY: cut in XY only. Cylinder X/Y/Z indicates cylinder axis. When using Box shapes, the RIM is also needed to calculate the potential. In Box for large enough boxes assigns Box side slighlty smaller than the cell box. In order to use the box a previous RandQpts (rim_cut) is needed.}} ''See also:'' <code>[[Variables#CUTBox|CUTBox]]</code><code>[[Variables#CUTRadius|CUTRadius]]</code><code>[[Variables#CUTCylLen|CUTCylLen]]</code><code>[[Variables#CUTwsGvec|CUTwsGvec]]</code> | ||
<span id=CUTBox></span> | <span id=CUTBox></span> | ||
{{var-basic|CUTBox|Length|Vector}} | {{var-basic|CUTBox|Length|Vector}}{{var-default|(0,0,0)}} | ||
{{var-short|Dimensions of box}} | {{var-short|Dimensions of box}} | ||
{{var-usage|Box side=0 means do not cut in that direction.}} | {{var-usage|Box side=0 means do not cut in that direction. }} | ||
<span id=CUTRadius></span> | <span id=CUTRadius></span> | ||
{{var-basic|CUTRadius|Length|Real}} | {{var-basic|CUTRadius|Length|Real}} | ||
{{var-short|Sphere/cylinder radius.}} | {{var-short|Sphere/cylinder radius.}} | ||
{{var-usage|}} | {{var-usage|Cutoff radius used in spehere and cylinder geometry}} | ||
<span id=CUTCylLen></span> | <span id=CUTCylLen></span> | ||
{{var-basic|CUTCylLen|Length|Real}} | {{var-basic|CUTCylLen|Length|Real}} | ||
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{{var-usage|CUTCylLen=0 indicates infinite cylinder}} | {{var-usage|CUTCylLen=0 indicates infinite cylinder}} | ||
<span id=CUTwsGvec></span> | <span id=CUTwsGvec></span> | ||
{{var-basic|CUTwsGvec|Energy|Real}} | {{var-basic|CUTwsGvec|Energy|Real}}{{var-default|0.7}} | ||
{{var-short|Energy cut off on modified component }} | {{var-short|Energy cut off on modified component }} | ||
{{var-usage|To be used together with CUTGeo="ws".Determines the number of components of the potential to be modified. }} ''See also:'' <code>[[Variables#CUTGeo|CUTGeo]]</code> | {{var-usage|To be used together with CUTGeo="ws".Determines the number of components of the potential to be modified. }} ''See also:'' <code>[[Variables#CUTGeo|CUTGeo]]</code> | ||
Line 153: | Line 154: | ||
{{var-usage|RandGvec=1 (gamma) is usually enough}} | {{var-usage|RandGvec=1 (gamma) is usually enough}} | ||
<span id=QpgFull></span> | <span id=QpgFull></span> | ||
{{var-basic|QpgFull||}}{{var-verbosity|RL}} | {{var-basic|QpgFull|None|Flag}}{{var-default|off}}{{var-verbosity|RL}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|}} | {{var-usage|Monte Carlo random integratio for the full coulomb matrix 1/|q+G||q+G'|}} | ||
<span id=Em1Anys></span> | <span id=Em1Anys></span> | ||
{{var-basic|Em1Anys||}}{{var-verbosity|RL}} | {{var-basic|Em1Anys||}}{{var-verbosity|RL}} | ||
Line 165: | Line 166: | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=CUTCol_test></span> | <span id=CUTCol_test></span> | ||
{{var-basic|CUTCol_test|None|Flag}} | {{var-basic|CUTCol_test|None|Flag}}{{var-default|off}}{{var-verbosity|RL}} | ||
{{var-short|Provides in | {{var-short|Provides in output the truncated Coulomb potential in real space}} | ||
{{var-usage|Useful option for debugging | {{var-usage|Useful option for debugging purposes.}} | ||
===Hartree-Fock Self-energy and Vxc=== | ===Hartree-Fock Self-energy and Vxc=== | ||
<span id=HF_and_locXC></span> | <span id=HF_and_locXC></span> | ||
{{var-basic|HF_and_locXC||String}} | {{var-basic|HF_and_locXC|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name}} | ||
{{var-usage|Activate with -x}} | {{var-usage|Activate with -x}} | ||
<span id=EXXRLvcs></span> | <span id=EXXRLvcs></span> | ||
{{var-basic|EXXRLvcs|RL/Energy|Integer/Real}} | {{var-basic|EXXRLvcs|RL/Energy|Integer/Real}}{{var-default|MaXGvecs}} | ||
{{var-short|Number of G-vectors used in the sum of the exchange self-energy Sx.}} | {{var-short|Number of G-vectors used in the sum of the exchange self-energy Sx.}} | ||
{{var-usage|It needs careful convergence. As it is not particularly time consuming, large values can be used to ensure convergence. Generally a large number is needed as the QP energies show a slow convergence. The calcualtion of the exchange part is rather fast.}} | {{var-usage|It needs careful convergence. As it is not particularly time consuming, large values can be used to ensure convergence. Generally a large number is needed as the QP energies show a slow convergence. The calcualtion of the exchange part is rather fast.}} | ||
<span id=VXCRLvcs></span> | <span id=VXCRLvcs></span> | ||
{{var-basic|VXCRLvcs||}} | {{var-basic|VXCRLvcs|RL/Energy|Integer/Real}}{{var-default|MaXGvecs}} | ||
{{var-short|}} | {{var-short|Number of G-vectors used in the evaluation of the density for the <Vxc> matrix element}} | ||
{{var-usage|}} | {{var-usage|A large number is needed in order to have a precise cancellation with the ground state calculation, in particular when GGA potential are used. A good measure of the accuracy is to compare the E_xc value printed in Yambo report and QE output file.}} | ||
<span id=QPkrange></span> | <span id=QPkrange></span> | ||
{{var-basic|QPkrange|None|Range}} | {{var-basic|QPkrange|None|Range}}{{var-default|All qp and all bands available.}} | ||
{{var-short|Range of states ( | {{var-short|Range of states (n,k) where GW/Sx elements are calculated}} | ||
{{var-usage|Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point | last k-point | lower band | upper band. This can be split over several lines for multiple groups - see the Format page for examples.}} ''See also:'' <code>[[Variables#QPerange|QPerange]]</code> | {{var-usage|Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point | last k-point | lower band | upper band. This can be split over several lines for multiple groups - see the Format page for examples.}} ''See also:'' <code>[[Variables#QPerange|QPerange]]</code> | ||
<span id=UseNLCC></span> | <span id=UseNLCC></span> | ||
{{var-basic|UseNLCC||}}{{var-verbosity|qp}} | {{var-basic|UseNLCC|None|Flag}}{{var-default|off}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|If present, add NLCC contributions to the charge density.}} | ||
{{var-usage|}} | {{var-usage|Care is needed. Beware NLCC are included in the Vxc but not in the exchange part of the self energy that could be inconsistent. Suggestion: if possible use PP without NLCC.}} | ||
<span id=QPerange></span> | <span id=QPerange></span> | ||
{{var-basic|QPerange|None/Energy|Range}}{{var-verbosity|qp}} | {{var-basic|QPerange|None/Energy|Range}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|Range of states (E,k) where GW/Sx elements are calculated}} | ||
{{var-usage|Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point | last k-point | lower energy | upper energy. This can be split over several lines for multiple groups.}} ''See also:'' <code>[[Variables#QPkrange|QPkrange]]</code> | {{var-usage|Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point | last k-point | lower energy | upper energy. This can be split over several lines for multiple groups.}} ''See also:'' <code>[[Variables#QPkrange|QPkrange]]</code> | ||
<span id=SE_CPU></span> | <span id=SE_CPU></span> | ||
{{var-basic|SE_CPU|None|String}}{{var-verbosity|par}} | {{var-basic|SE_CPU|None|String}}{{var-verbosity|par}} | ||
{{var-short|CPUs for each role}} | {{var-short|CPUs for each role}} | ||
{{var-usage|}} | {{var-usage|For consistency the product of the CPUs for each role has to be equal to the number of MPI tasks of the job}} | ||
<span id=SE_ROLEs></span> | <span id=SE_ROLEs></span> | ||
{{var-basic|SE_ROLEs|None|String}}{{var-verbosity|par}} | {{var-basic|SE_ROLEs|None|String}}{{var-verbosity|par}} | ||
{{var-short|CPUs roles (q,qp,b)}} | {{var-short|CPUs roles (q,qp,b)}} | ||
{{var-usage|Here qp=quasiparticle states, q=transferred momenta, b=bands in G summation. MPI-b best memory distribution. MPI-qp no communication. MPI-q leads to load unbalance.}} | {{var-usage|Here qp=quasiparticle states, q=transferred momenta, b=bands in G summation. MPI-b best memory distribution. MPI-qp no communication. MPI-q leads to load unbalance.}} ''See also:'' <code>[[Variables#SE_ROLEs|SE_ROLEs]]</code> | ||
<span id=SE_Threads></span> | <span id=SE_Threads></span> | ||
{{var-basic|SE_Threads|None|Integer}}{{var-verbosity|par}} | {{var-basic|SE_Threads|None|Integer}}{{var-verbosity|par}} | ||
{{var-short|Number of threads for self-energy}} | {{var-short|Number of threads for self-energy}} | ||
{{var-usage|Very efficient.}} | {{var-usage|Very efficient. To be effective the code should have been compiled with OMP support.}} | ||
===GW=== | ===GW=== | ||
<span id=cohsex></span> | <span id=cohsex></span> | ||
{{var-basic|cohsex||String}} | {{var-basic|cohsex|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=gw0></span> | <span id=gw0></span> | ||
{{var-basic|gw0||String}} | {{var-basic|gw0|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name}} | ||
{{var-usage|}} | {{var-usage|Activate with -g <opt> }} | ||
<span id=life ></span> | |||
{{var-basic|life |None|String}} | |||
{{var-short|Runlevel name}} | |||
{{var-usage|Activate with -l option.}} | |||
<span id=QPkrange></span> | <span id=QPkrange></span> | ||
{{var-basic|QPkrange|None|Range}} | {{var-basic|QPkrange|None|Range}}{{var-default|From ns.db1 (all k-points, all bands)}} | ||
{{var-short|K-points and band range where you want to calculate the GW correction.}} | {{var-short|K-points and band range where you want to calculate the GW correction.}} | ||
{{var-usage|If interested in non consecutive kpoints or bands multiple rows can be also considered. The syntax is first kpoint | last kpoint | first band | last band}} | {{var-usage|If interested in non consecutive kpoints or bands multiple rows can be also considered. The syntax is first kpoint | last kpoint | first band | last band}} | ||
Line 235: | Line 240: | ||
{{var-usage|"n" Newton linearization (First order expansion around KS eigenvalue), 's' non linear iterative secant method}} | {{var-usage|"n" Newton linearization (First order expansion around KS eigenvalue), 's' non linear iterative secant method}} | ||
<span id=LifeTrCG></span> | <span id=LifeTrCG></span> | ||
{{var-basic|LifeTrCG||}} | {{var-basic|LifeTrCG|None|Real}}{{var-default|100}} | ||
{{var-short|}} | {{var-short|Lifetime transition reduction (%)}} | ||
{{var-usage| | {{var-usage|}} | ||
<span id=GfnQPdb></span> | <span id=GfnQPdb></span> | ||
{{var-redirect|GfnQPdb|<code>[[Variables#KfnQPdb|KfnQPdb]]</code>}} | {{var-redirect|GfnQPdb|<code>[[Variables#KfnQPdb|KfnQPdb]]</code>}} | ||
Line 263: | Line 268: | ||
{{var-usage|Default is "none", possible options are "BG" for the Bruneval-Gonze terminator. See BG[1]. It speeds up the convergence with respect to number of empty bands.}} | {{var-usage|Default is "none", possible options are "BG" for the Bruneval-Gonze terminator. See BG[1]. It speeds up the convergence with respect to number of empty bands.}} | ||
<span id=GTermEn></span> | <span id=GTermEn></span> | ||
{{var-basic|GTermEn||}}{{var-verbosity|qp}} | {{var-basic|GTermEn|Energy|}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|Energy of the fictitious pole of the terminator}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=NewtDchk></span> | <span id=NewtDchk></span> | ||
Line 283: | Line 288: | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=GEnSteps></span> | <span id=GEnSteps></span> | ||
{{var-basic|GEnSteps| | {{var-basic|GEnSteps||}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|-g s}} | {{var-usage|-g s}} | ||
<span id=GEnRnge></span> | <span id=GEnRnge></span> | ||
{{var-basic|GEnRnge| | {{var-basic|GEnRnge||}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|-g s}} | {{var-usage|-g s}} | ||
<span id=GDmRnge></span> | <span id=GDmRnge></span> | ||
{{var-basic|GDmRnge| | {{var-basic|GDmRnge||}}{{var-verbosity|qp}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|-g s}} | {{var-usage|-g s}} | ||
Line 306: | Line 311: | ||
{{var-basic|NGsBlkXd|RL/Energy|Integer/Real}} | {{var-basic|NGsBlkXd|RL/Energy|Integer/Real}} | ||
{{var-short|Number of G-vectors or energy cut off in the screening (response block size)}} | {{var-short|Number of G-vectors or energy cut off in the screening (response block size)}} | ||
{{var-usage|Determines the size of the dielectric matrix in G-space. Needed for inclusion of local field effects, it should be much smaller than the number of G-vectors needed to expand the wavefunctions (FFTGvecs). It needs careful convergence, and should be converged along with | {{var-usage|Determines the size of the dielectric matrix in G-space. Needed for inclusion of local field effects, it should be much smaller than the number of G-vectors needed to expand the wavefunctions (FFTGvecs). It needs careful convergence, and should be converged along with BndsRnXd. Depends strongly on the system inhomogeneity.}} ''See also:'' <code>[[Variables#BndsRnXp|BndsRnXp]]</code><code>[[Variables#FFTGvecs|FFTGvecs]]</code> | ||
<span id=PPAPntXp></span> | <span id=PPAPntXp></span> | ||
{{var-basic|PPAPntXp|Energy|Real}}{{var-default|1 Ha (27.2114eV)}} | {{var-basic|PPAPntXp|Energy|Real}}{{var-default|1 Ha (27.2114eV)}} | ||
Line 323: | Line 328: | ||
===Optics/chi in G-space=== | ===Optics/chi in G-space=== | ||
<span id=optics></span> | <span id=optics></span> | ||
{{var-basic|optics||String}} | {{var-basic|optics|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name: "Optics"}} | ||
{{var-usage|}} | {{var-usage|Activate with -o <opt>. Optics runlevel.}} | ||
<span id=chi></span> | <span id=chi></span> | ||
{{var-basic|chi||String}} | {{var-basic|chi|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name: "Dyson equation for chi."}} | ||
{{var-usage|}} | {{var-usage|Activate with -o c. Dyson equation for chi.}} | ||
<span id=tddft></span> | |||
{{var-basic|tddft|None|String}} | |||
{{var-short|Runlevel name: "Use TDDFT kernel"}} | |||
{{var-usage|Activate with -k alda or -k lrc. Use TDDFT kernel}} | |||
<span id=Chimod></span> | <span id=Chimod></span> | ||
{{var-basic|Chimod|None|String}} | {{var-basic|Chimod|None|String}} | ||
Line 371: | Line 380: | ||
{{var-usage|Needs convergence study. Much less than FFTGvecs}} | {{var-usage|Needs convergence study. Much less than FFTGvecs}} | ||
<span id=LRC_alpha></span> | <span id=LRC_alpha></span> | ||
{{var-basic|LRC_alpha||}} | {{var-basic|LRC_alpha|None|Real}}{{var-default|0.00}} | ||
{{var-short|LRC fitting parameter}} | {{var-short|LRC fitting parameter alpha}} | ||
{{var-usage|Long-range tail of the fxc kernel. Depends on the system: the larger the screening the smaller this parameter.}} | {{var-usage|Long-range tail of the fxc kernel. Depends on the system: the larger the screening the smaller this parameter.}} | ||
<span id=XfnQPdb></span> | <span id=XfnQPdb></span> | ||
Line 431: | Line 440: | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=DipApproach></span> | <span id=DipApproach></span> | ||
{{var-basic|DipApproach||}}{{var-verbosity|resp}} | {{var-basic|DipApproach||String}}{{var-default|G-space v}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Different ways to calculate dipole matrix elements}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=DipPDirect></span> | <span id=DipPDirect></span> | ||
Line 496: | Line 505: | ||
===Optics/BSE in eh-space=== | ===Optics/BSE in eh-space=== | ||
<span id=bse></span> | <span id=bse></span> | ||
{{var-basic|bse||String}} | {{var-basic|bse|None|String}} | ||
{{var-short|Runlevel name}} | {{var-short|Runlevel name: "Bethe Salpeter Equation"}} | ||
{{var-usage|}} | {{var-usage|Activate with -o b}} | ||
<span id=K_Threads></span> | <span id=K_Threads></span> | ||
{{var-basic|K_Threads||Integer}} | {{var-basic|K_Threads|None|Integer}} | ||
{{var-short|}} | {{var-short|Number of threads for response functions}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BSEmod></span> | <span id=BSEmod></span> | ||
{{var-basic|BSEmod||}} | {{var-basic|BSEmod|None|String}}{{var-default|retarded}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|}} | {{var-usage|resonant/retarded/coupling}} | ||
<span id=BSKmod></span> | <span id=BSKmod></span> | ||
{{var-basic|BSKmod||}} | {{var-basic|BSKmod|None|String}}{{var-default|IP}} | ||
{{var-short|}} | {{var-short|Bethe Salpeter kernel}} | ||
{{var-usage|}} | {{var-usage|Do not set this manually: activate with the appropriate -k <opt> command line option, where opt is one of IP/Hartree/HF/ALDA/SEX.}} | ||
<span id=BEnRange></span> | <span id=BEnRange></span> | ||
{{var-basic|BEnRange|Energy|Range}} | {{var-basic|BEnRange|Energy|Range}}{{var-default|[0:10] eV}} | ||
{{var-short|Energy range for computing the macroscopic dielectric function using BSE}} | {{var-short|Energy range for computing the macroscopic dielectric function using BSE}} | ||
{{var-usage|}} | {{var-usage|}} | ||
Line 520: | Line 529: | ||
{{var-usage|Lorentzian broadening changes linearly between the two values}} | {{var-usage|Lorentzian broadening changes linearly between the two values}} | ||
<span id=BEnSteps></span> | <span id=BEnSteps></span> | ||
{{var-basic|BEnSteps|None|Integer}} | {{var-basic|BEnSteps|None|Integer}}{{var-default|100}} | ||
{{var-short|Number of evenly spaced energy points in spectrum}} | {{var-short|Number of evenly spaced energy points in spectrum}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BLongDir></span> | <span id=BLongDir></span> | ||
{{var-basic|BLongDir|None|Vector}} | {{var-basic|BLongDir|None|Vector}}{{var-default|(1,0,0)}} | ||
{{var-short|Direction of the longitudinal perturbation}} | {{var-short|Direction of the longitudinal perturbation}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BSEBands></span> | <span id=BSEBands></span> | ||
{{var-basic|BSEBands|None|Range}} | {{var-basic|BSEBands|None|Range}}{{var-default|All bands}} | ||
{{var-short|Bands range: Specifies the band states from which the electron-hole basis of the BSE kernel is constructed}} | {{var-short|Bands range: Specifies the band states from which the electron-hole basis of the BSE kernel is constructed}} | ||
{{var-usage|Choose few bands close to the Fermi level. Size scales rapidly with the number of bands: BSE is rewritten as an eigenvalue problem for the 2 particle Hamiltonian: size of matrix [Nv x Nc x NKBZ ] x [Nv x Nc x NKBZ]}} | {{var-usage|Choose few bands close to the Fermi level. Size scales rapidly with the number of bands: BSE is rewritten as an eigenvalue problem for the 2 particle Hamiltonian: size of matrix [Nv x Nc x NKBZ ] x [Nv x Nc x NKBZ]}} | ||
Line 577: | Line 586: | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=DbGdQsize></span> | <span id=DbGdQsize></span> | ||
{{var-basic|DbGdQsize||}}{{var-verbosity|resp}} | {{var-basic|DbGdQsize|None|Real}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Percentual of the total DbGd transitions to be used}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=DipApproach></span> | <span id=DipApproach></span> | ||
{{var-basic|DipApproach||}}{{var-verbosity|resp}} | {{var-basic|DipApproach|None|String}}{{var-default|G-space v}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|how dipoles are calculated:G-space v}} | ||
{{var-usage|}} | {{var-usage|Options are: G-space v/R-space x/Covariant/Shifted grids}} | ||
<span id=DipPDirect></span> | <span id=DipPDirect></span> | ||
{{var-basic|DipPDirect||}}{{var-verbosity|resp}} | {{var-basic|DipPDirect|None|Flag}}{{var-default|off}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Directly compute <v> also when using other approaches for dipoles}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=ShiftedPaths></span> | <span id=ShiftedPaths></span> | ||
{{var-basic|ShiftedPaths||}}{{var-verbosity|resp}} | {{var-basic|ShiftedPaths|None|String}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Shifted grids paths (separated by a space)}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=Gauge></span> | <span id=Gauge></span> | ||
{{var-basic|Gauge||}}{{var-verbosity|resp}} | {{var-basic|Gauge|None|String}}{{var-default|length}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Switch between lenght or velocity gauge}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=NoCondSumRule></span> | <span id=NoCondSumRule></span> | ||
{{var-basic|NoCondSumRule||}}{{var-verbosity|resp}} | {{var-basic|NoCondSumRule|None|Flag}}{{var-default|off}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Do not impose the conductivity sum rule in velocity gauge}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=MetDamp></span> | <span id=MetDamp></span> | ||
{{var-basic|MetDamp||}}{{var-verbosity|resp}} | {{var-basic|MetDamp|None|Flag}}{{var-default|off}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Define \w+=sqrt(\w*(\w+i\eta))}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=Reflectivity></span> | <span id=Reflectivity></span> | ||
{{var-basic|Reflectivity||}}{{var-verbosity|resp}} | {{var-basic|Reflectivity|None|Flag}}{{var-default|off}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Compute reflectivity at normal incidence}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=DrudeWBS></span> | <span id=DrudeWBS></span> | ||
{{var-basic|DrudeWBS||}}{{var-verbosity|resp}} | {{var-basic|DrudeWBS|Energy|Complex}}{{var-verbosity|resp}} | ||
{{var-short|}} | {{var-short|Drude plasmon}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BS_CPU></span> | <span id=BS_CPU></span> | ||
{{var-basic|BS_CPU||}}{{var-verbosity|par}} | {{var-basic|BS_CPU||}}{{var-verbosity|par}} | ||
{{var-short|}} | {{var-short| CPUs for each role}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BS_ROLEs></span> | <span id=BS_ROLEs></span> | ||
{{var-basic|BS_ROLEs||}}{{var-verbosity|par}} | {{var-basic|BS_ROLEs||}}{{var-verbosity|par}} | ||
{{var-short|}} | {{var-short| CPUs for each role}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BS_nCPU_LinAlg_INV></span> | <span id=BS_nCPU_LinAlg_INV></span> | ||
Line 630: | Line 639: | ||
===Bethe Salpeter Kernel=== | ===Bethe Salpeter Kernel=== | ||
<span id=bsk></span> | <span id=bsk></span> | ||
{{var-basic|bsk||}} | {{var-basic|bsk|None|String}} | ||
{{var-short|}} | {{var-short|Runlevel name: "Bethe Salpeter Equation kernel"}} | ||
{{var-usage|}} | {{var-usage|Activate with -k <opt>}} | ||
<span id=bss></span> | |||
{{var-basic|bss|None|String}} | |||
{{var-short|Runlevel name: "Bethe Salpeter Equation solver"}} | |||
{{var-usage|Activate with -y <opt>}} | |||
<span id=BSENGexx></span> | <span id=BSENGexx></span> | ||
{{var-basic|BSENGexx|RL/Energy|Integer/Real}} | {{var-basic|BSENGexx|RL/Energy|Integer/Real}} | ||
Line 642: | Line 655: | ||
{{var-usage|Try using the diagonal terms only first (BSresKmod BScplKmod variables); use a smaller number than the dimension of the Screened interaction matrix}} | {{var-usage|Try using the diagonal terms only first (BSresKmod BScplKmod variables); use a smaller number than the dimension of the Screened interaction matrix}} | ||
<span id=WehCpl></span> | <span id=WehCpl></span> | ||
{{var-basic|WehCpl||Flag}} | {{var-basic|WehCpl|None|Flag}} | ||
{{var-short|}} | {{var-short|activate W in the Coupling part}} | ||
{{var-usage|}} | |||
<span id=WehDiag></span> | |||
{{var-basic|WehDiag|None|Flag}} | |||
{{var-short|diagonal (G-space) the eh interaction}} | |||
{{var-usage|}} | {{var-usage|}} | ||
<span id=BSSmod></span> | <span id=BSSmod></span> | ||
{{var-basic|BSSmod||}} | {{var-basic|BSSmod|None|String}} | ||
{{var-short|}} | {{var-short|select solver for BSE}} | ||
{{var-usage|}} | {{var-usage|(h)aydock/(d)iagonalization/(i)nversion/(t)ddft}} | ||
<span id=BSHayTrs></span> | <span id=BSHayTrs></span> | ||
{{var-basic|BSHayTrs|None|Real}}{{var-default|-0.02}} | {{var-basic|BSHayTrs|None|Real}}{{var-default|-0.02}} | ||
Line 654: | Line 671: | ||
{{var-usage|Negative sign: average difference, over the energy range, of two consecutive approximations to the spectrum. Positive sign: maximum difference, over the energy range, of two consecutive approximations to the spectrum}} | {{var-usage|Negative sign: average difference, over the energy range, of two consecutive approximations to the spectrum. Positive sign: maximum difference, over the energy range, of two consecutive approximations to the spectrum}} | ||
<span id=BSSInvMode></span> | <span id=BSSInvMode></span> | ||
{{var-basic|BSSInvMode||}} | {{var-basic|BSSInvMode|None|String}}{{var-default|Off}} | ||
{{var-short|select full or perturbative inversion solver for BSE}} | |||
{{var-usage|(p) perturbative (f) full}} | |||
<span id=BSEPSInvTrs></span> | |||
{{var-basic|BSEPSInvTrs|None|Real}}{{var-default|0.01}} | |||
{{var-short|Inversion treshold. }} | |||
{{var-usage|Relative[o/o](>0)/Absolute(<0)}} | |||
<span id=BSSInvPFratio></span> | |||
{{var-basic|BSSInvPFratio|None|real}} | |||
{{var-short|Inversion solver. Ratio between the number of frequencies solved pert/full}} | |||
{{var-usage|}} | |||
<span id=BSSInvKdiag></span> | |||
{{var-basic|BSSInvKdiag|None|Flag}} | |||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id= | <span id=BSSPertWidth ></span> | ||
{{var-basic| | {{var-basic|BSSPertWidth |None|Flag}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id= | <span id=WRbsWF></span> | ||
{{var-basic| | {{var-basic|WRbsWF|None|Flag}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|}} | {{var-usage|}} | ||
===Non-linear=== | ===Non-linear=== | ||
<span id=nloptics></span> | <span id=nloptics></span> | ||
Line 700: | Line 730: | ||
{{var-usage|}} | {{var-usage|}} | ||
<span id=EvalCurrent></span> | <span id=EvalCurrent></span> | ||
{{var-basic|EvalCurrent|| | {{var-basic|EvalCurrent||Flag}}{{var-default|Off}} | ||
{{var-short|}} | {{var-short|}} | ||
{{var-usage|Calculate the current if true}} | {{var-usage|Calculate the current if true}} | ||
Line 719: | Line 749: | ||
{{var-short|Field kind}} | {{var-short|Field kind}} | ||
{{var-usage|Type of external field, for non-linear response only SIN or SOFTSIN}} | {{var-usage|Type of external field, for non-linear response only SIN or SOFTSIN}} | ||
<span id=NLLrcAlpha></span> | |||
{{var-basic|NLLrcAlpha||Real}}{{var-verbosity|nl}} | |||
{{var-short|Long range alpha correction}} | |||
{{var-usage|}} | |||
<span id=UseDipoles></span> | |||
{{var-basic|UseDipoles||Flag}}{{var-default|Off}}{{var-verbosity|nl}} | |||
{{var-short|Use Covariant Dipoles (just for test purpose)}} | |||
{{var-usage|}} | |||
<span id=FrSndOrd></span> | |||
{{var-basic|FrSndOrd||Flag}}{{var-default|Off}} | |||
{{var-short|Force second order numerical derivatives (only for testing purpose)}} | |||
{{var-usage|}} |
Latest revision as of 12:22, 11 June 2021
This page gives a brief explanation of the many input variables used by Yambo.
Variables apply to the standard yambo
executable unless indicated otherwise.
Default values are read from the indicated database file unless stated otherwise.
Required verbosity flags are indicated where appropriate.
Units can have the following values:
- None = no unit
- RL = number of G-vectors
- Energy = Ha, mHa (Hartree atomic units), Ry, mRy (Rydberg atomic units), eV, meV (electron volts), K, THz, GHz
- Length = Bohr atomic units a.u.
Formats are described on the Format page.
DO NOT EDIT THIS PAGE DIRECTLY!!! CHANGES WILL BE LOST!!!
All Variables (alphabetical order)
BDmRange
BEnRange
BEnSteps
BLongDir
BndsRnXd
BndsRnXp
BoseCut
BoseTemp
BS_CPU
BS_nCPU_LinAlg_DIAGO
BS_nCPU_LinAlg_INV
BS_ROLEs
bse
BSEBands
BSEmod
BSENGBlk
BSENGexx
BSEPSInvTrs
BSHayTrs
bsk
BSKmod
bss
BSSInvKdiag
BSSInvMode
BSSInvPFratio
BSSmod
BSSPertWidth
CGrdSpXd
chi
ChiLinAlgMod
Chimod
cohsex
CUTBox
CUTCol_test
CUTCylLen
CUTGeo
CUTRadius
CUTwsGvec
DbGdQsize
DbGdQsize
DBsFRAGpm
DBsIOoff
DIP_Threads
DipApproach
DipApproach
DipPDirect
DipPDirect
DmERefXd
DmRngeXd
DmRngeXp
DrClassic
DrudeWBS
DrudeWXd
dScStep
DysSolver
EhEngyXd
ElecTemp
Em1Anys
em1d
em1s
EMStpsXd
EnRngeXd
EnRngeXp
ETStpsXd
ETStpsXp
EvalCurrent
ExtendOut
ExtF_Dir
ExtF_kind
EXXRLvcs
EXXRLvcs
FFTGvecs
FrSndOrd
FxcGRLc
Gauge
GbndRnge
GDamping
GDmRnge
GEnRnge
GEnSteps
GfnQP_E
GfnQP_N
GfnQP_Wc
GfnQP_Wc_dos
GfnQP_Wc_E
GfnQP_Wv
GfnQP_Wv_dos
GfnQP_Wv_E
GfnQP_Z
GfnQPdb
GrFnTpXd
GTermEn
GTermKind
gw0
HARRLvcs
HF_and_locXC
IDEm1Ref
IkSigLim
IkXLim
K_Threads
KfnQP_E
KfnQP_N
KfnQP_Wc
KfnQP_Wc_dos
KfnQP_Wc_E
KfnQP_Wv
KfnQP_Wv_dos
KfnQP_Wv_E
KfnQP_Z
KfnQPdb
life
LifeTrCG
LongDrXd
LongDrXp
LRC_alpha
MaxGvecs
MEM_tresh
MetDamp
Nelectro
NewtDchk
NGsBlkXd
NLBands
NLCorrelation
NLDamping
NLintegrator
NLLrcAlpha
NLogCPUs
nloptics
NLstep
NLtime
NLverbosity
NoCondSumRule
NonPDirs
OccTresh
OnMassShell
optics
PAR_def_mode
PAR_def_mode
PPAPntXp
Qdirection
QPerange
QPerange
QpgFull
QPkrange
QPkrange
QpntsRXd
QptCoord
QShiftOrder
RandGvec
RandQpts
Reflectivity
rim_cut
SE_CPU
SE_ROLEs
SE_Threads
setup
ShiftedPaths
ShiftedPaths
StdoHash
tddft
UseDipoles
UseNLCC
VXCRLvcs
WehCpl
WehDiag
WFbuffIO
WRbsWF
X_all_q_CPU
X_all_q_nCPU_LinAlg_INV
X_all_q_ROLEs
X_finite_q_CPU
X_finite_q_nCPU_LinAlg_INV
X_finite_q_ROLEs
X_q_0_CPU
X_q_0_nCPU_LinAlg_INV
X_q_0_ROLEs
X_Threads
XfnQP_E
XfnQP_N
XfnQP_Wc
XfnQP_Wc_dos
XfnQP_Wc_E
XfnQP_Wv
XfnQP_Wv_dos
XfnQP_Wv_E
XfnQP_Z
XfnQPdb
Global options
Nelectro
(Units: None, Format: Real)Default: From ns.db1 Verbosity:-V gen
- Meaning: Number of electrons
- Usage: Change to shift the Fermi level by hand.
ElecTemp
(Units: Energy, Format: Real)Default: 0.000 Verbosity:-V gen
- Meaning: Electronic Temperature
- Usage:
BoseTemp
(Units: Energy, Format: Real)Default: -1 Verbosity:-V gen
- Meaning: Bosonic Temperature
- Usage:
OccTresh
(Units: None, Format: Real)Default: 1.00E-05 Verbosity:-V gen
- Meaning: Occupation treshold (metallic bands)
- Usage:
StdoHash
(Units: None, Format: Integer)Default: 40 Verbosity:-V io
- Meaning: Number of hashes in live-timing output.
- Usage: Might be useful to increase for very long jobs, or if the code is hanging.
DBsIOoff
(Units: None, Format: String)Default: none Verbosity:-V io
- Meaning: List of databases not written to disk
- Usage: Space-separated list of DB with NO I/O. DB is (DIP,X,HF,COLLs,J,GF,CARRIERs,OBS,W,SC,BS,ALL). No ndb.* file is written.
- Example: DBsIOoff= "DIP" means ndb.dip_iR_and_P_fragment_* is not written, but stored in memory if Yambo needs it.
DBsFRAGpm
(Units: None, Format: String)Default: none Verbosity:-V io
- Meaning: List of databases to be fragmented
- Usage: Space-separated list of +DB to FRAG and -DB to NOT FRAG, where DB is (DIP,X,W,HF,COLLS,K,BS,QINDX,RT,ELP. Fragments the database. Smaller files (e.g. ndb.em1s_fragment_*) are created instead of a large one (e.g. ndb.em1s). Faster read/write operations in parallel runs
WFbuffIO
(Units: None, Format: Flag)Default: Off Verbosity:-V io
- Meaning: Wave-functions buffered I/O
- Usage: Parts of the WFs are stored by the node. Nodes communicate when these elements are needed. Memory heavy.
MEM_tresh
(Units: Kb, Format: Integer)Default: 10000 Verbosity:-V gen
- Meaning: Threshold on traced memory allocations/deallocations
- Usage:
NLogCPUs
(Units: None, Format: Integer) Verbosity:-V par
- Meaning: Live-timing CPU`s (0 for all)
- Usage: Number of CPUs that write a LOG file. 0 means all CPUs.
PAR_def_mode
(Units: None, Format: String)Default: balanced Verbosity:-V par
- Meaning: Parallelization mode ("balanced"/"memory"/"workload")
- Usage: You can set "memory" to save memory
FFTGvecs
(Units: RL/Energy, Format: Integer/Real) Verbosity:-V RL
- Meaning: Number of G-vectors or energy cut off for expanding the wavefunctions/FFT transforms
- Usage: Determines size (memory) of calculation. Corresponds to cutoff in DFT calculation; can be much less than geometry cutoff. It needs careful convergence.
Initialization
MaxGvecs
(Units: RL/Energy, Format: Integer/Real) Verbosity:-V RL
- Meaning: Maximum number of G-vectors that can be used by code
- Usage:
IkSigLim
(Units: Range, Format: Integer ) Verbosity:-V kpt
- Meaning: QP K-points indices range
- Usage:
Random integration method and cutoff Coulomb potentials
RandQpts
(Units: RL, Format: Integer)- Meaning: Number of random q-points in the BZ to perform Monte Carlo Integration,
- Usage: It needs convergence: values like 10^6 can be used to ensure convergence. Needed for non 3D system to avoid divergences for small q, and needed to build cutoff potential with box shape See also:
RandGvec
CUTGeo
(Units: None, Format: String)Default: none- Meaning: Cutoff geometry
- Usage: Allowed values are: "box/cylinder/sphere/ws X/Y/Z/XY...", e.g. "box xy" or "cylinder y". WS is the suggested option for orthorhombic cells. Use sphere (0D) for molecules, cylinder (1D) for polymers and nanotubes, box (0D, 1D, 2D) for all geometries. XYZ: cut in all directions. Box: XY: cut in XY only. Cylinder X/Y/Z indicates cylinder axis. When using Box shapes, the RIM is also needed to calculate the potential. In Box for large enough boxes assigns Box side slighlty smaller than the cell box. In order to use the box a previous RandQpts (rim_cut) is needed. See also:
CUTBox
CUTRadius
CUTCylLen
CUTwsGvec
CUTRadius
(Units: Length, Format: Real)- Meaning: Sphere/cylinder radius.
- Usage: Cutoff radius used in spehere and cylinder geometry
CUTwsGvec
(Units: Energy, Format: Real)Default: 0.7- Meaning: Energy cut off on modified component
- Usage: {{{1}}} See also:
CUTGeo
RandGvec
(Units: Energy, Format: ) Verbosity:-V RL
- Meaning: Number of G vectors the RIM is calculated at
- Usage: {{{1}}}
QpgFull
(Units: None, Format: Flag)Default: off Verbosity:-V RL
- Meaning:
- Usage: Monte Carlo random integratio for the full coulomb matrix 1/
CUTCol_test
(Units: None, Format: Flag)Default: off Verbosity:-V RL
- Meaning: Provides in output the truncated Coulomb potential in real space
- Usage: Useful option for debugging purposes.
Hartree-Fock Self-energy and Vxc
EXXRLvcs
(Units: RL/Energy, Format: Integer/Real)Default: MaXGvecs- Meaning: Number of G-vectors used in the sum of the exchange self-energy Sx.
- Usage: It needs careful convergence. As it is not particularly time consuming, large values can be used to ensure convergence. Generally a large number is needed as the QP energies show a slow convergence. The calcualtion of the exchange part is rather fast.
VXCRLvcs
(Units: RL/Energy, Format: Integer/Real)Default: MaXGvecs- Meaning: Number of G-vectors used in the evaluation of the density for the <Vxc> matrix element
- Usage: A large number is needed in order to have a precise cancellation with the ground state calculation, in particular when GGA potential are used. A good measure of the accuracy is to compare the E_xc value printed in Yambo report and QE output file.
QPkrange
(Units: None, Format: Range)Default: All qp and all bands available.- Meaning: Range of states (n,k) where GW/Sx elements are calculated
- Usage: Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point See also:
QPerange
UseNLCC
(Units: None, Format: Flag)Default: off Verbosity:-V qp
- Meaning: If present, add NLCC contributions to the charge density.
- Usage: Care is needed. Beware NLCC are included in the Vxc but not in the exchange part of the self energy that could be inconsistent. Suggestion: if possible use PP without NLCC.
QPerange
(Units: None/Energy, Format: Range) Verbosity:-V qp
- Meaning: Range of states (E,k) where GW/Sx elements are calculated
- Usage: Careful use of fewer k-points and bands reduces the calculation time; yambo will interpolate the rest. Format is: first k-point See also:
QPkrange
SE_CPU
(Units: None, Format: String) Verbosity:-V par
- Meaning: CPUs for each role
- Usage: For consistency the product of the CPUs for each role has to be equal to the number of MPI tasks of the job
SE_ROLEs
(Units: None, Format: String) Verbosity:-V par
- Meaning: CPUs roles (q,qp,b)
- Usage: {{{1}}} See also:
SE_ROLEs
SE_Threads
(Units: None, Format: Integer) Verbosity:-V par
- Meaning: Number of threads for self-energy
- Usage: Very efficient. To be effective the code should have been compiled with OMP support.
GW
QPkrange
(Units: None, Format: Range)Default: From ns.db1 (all k-points, all bands)- Meaning: K-points and band range where you want to calculate the GW correction.
- Usage: If interested in non consecutive kpoints or bands multiple rows can be also considered. The syntax is first kpoint
GbndRnge
(Units: None, Format: Range)- Meaning: Specifies the range of bands entering in the sum over states in the correlation part of the self energy
- Usage: It needs several empty states. Single quasiparticle states converges very slowly with respect GbndRnge, energy differences (e.g. gaps) behave better. See also GTermKind variable in order to speed up the convergences.This number is usually larger than the number of bands used to calculated the dielectricconstant. Single quasiparticle energies converge slowly with respect GbndRnge, energy difference behave better. You can use terminator technique to mitigate the slow dependence.
GDamping
(Units: , Format: )- Meaning: Small damping in the Green's function definition, the delta parameter.
- Usage: The final result shouuld not depend on that, usually set at 0.1 eV
DysSolver
(Units: , Format: )- Meaning: Indicates method used to solve the Dyson equation
- Usage: "n" Newton linearization (First order expansion around KS eigenvalue), 's' non linear iterative secant method
GfnQPdb
SeeKfnQPdb
GfnQP_N
SeeKfnQP_N
GfnQP_E
SeeKfnQP_E
GfnQP_Z
SeeKfnQP_Z
GfnQP_Wv_E
SeeKfnQP_Wv_E
GfnQP_Wv
SeeKfnQP_Wv
GfnQP_Wv_dos
SeeKfnQP_Wv_dos
GfnQP_Wc_E
SeeKfnQP_Wc_E
GfnQP_Wc
SeeKfnQP_Wc
GfnQP_Wc_dos
SeeKfnQP_Wc_dos
GTermKind
(Units: None, Format: String) Verbosity:-V qp
- Meaning: Type of terminator to accelarate onvergence with respect empty states
- Usage: Default is "none", possible options are "BG" for the Bruneval-Gonze terminator. See BG[1]. It speeds up the convergence with respect to number of empty bands.
GTermEn
(Units: Energy, Format: ) Verbosity:-V qp
- Meaning: Energy of the fictitious pole of the terminator
- Usage:
ExtendOut
(Units: None, Format: Flag) Verbosity:-V qp
- Meaning: Extended output: Print more quantities in qp output files
- Usage:
Screening
NGsBlkXd
(Units: RL/Energy, Format: Integer/Real)- Meaning: Number of G-vectors or energy cut off in the screening (response block size)
- Usage: Determines the size of the dielectric matrix in G-space. Needed for inclusion of local field effects, it should be much smaller than the number of G-vectors needed to expand the wavefunctions (FFTGvecs). It needs careful convergence, and should be converged along with BndsRnXd. Depends strongly on the system inhomogeneity. See also:
BndsRnXp
FFTGvecs
PPAPntXp
(Units: Energy, Format: Real)Default: 1 Ha (27.2114eV)- Meaning: Plasmon pole Imaginary Energy
- Usage: The self energy in the imaginary axis should be a smooth function so it should not have a strong dependence on this pole energy. Set it at an higher value of the plasmon energy (see EELS spectrum). this is the second frequency used to fit the Godby-Needs plasmon-pole model (PPM). If results depend consistently by changing this frequency, the PPM is not adequate for your calculation and it is need to gp beyond that, e.g. Real-axis.
BndsRnXp
SeeBndsRnXd
EnRngeXp
SeeEnRngeXd
DmRngeXp
SeeDmRngeXd
ETStpsXp
SeeETStpsXd
LongDrXp
SeeLongDrXd
Optics/chi in G-space
optics
(Units: None, Format: String)- Meaning: Runlevel name: "Optics"
- Usage: Activate with -o <opt>. Optics runlevel.
chi
(Units: None, Format: String)- Meaning: Runlevel name: "Dyson equation for chi."
- Usage: Activate with -o c. Dyson equation for chi.
tddft
(Units: None, Format: String)- Meaning: Runlevel name: "Use TDDFT kernel"
- Usage: Activate with -k alda or -k lrc. Use TDDFT kernel
Chimod
(Units: None, Format: String)- Meaning: Type of kernel in TDDFT Dyson equation
- Usage: Do not set this manually - set using the appropriate -k command line option. Allowed values: IP/Hartree/ALDA/LRC/BSfxc. IP indicates no kernel (independent particle level/RPA without local fields)
X_Threads
(Units: None, Format: Integer)- Meaning: Number of threads for response functions
- Usage: efficient, need extra mem
QpntsRXd
(Units: None, Format: Range)- Meaning: Range of indexes of q-points/transferred momenta to be computed.
- Usage: Set to 1 1 to select just the long wavelength term. Range from 1:nqpt.
BndsRnXd
(Units: None, Format: Range)- Meaning: Bands range: Specifies the number of bands entering in the sum over states in the RPA response function
- Usage: It needs several empty states. See also GTermKind variable in order to speed up the convergences. Reduce range in order to lower memory. In metals it includes partially filled bands. See also EhEngyXd. See also:
GTermKind
EnRngeXd
(Units: Energy, Format: Range)- Meaning: Energy range the spectrum is calculated across.
- Usage: Extremae of the energy range across which optical spectra will be computed. See also:
EhEngyXd
DmRngeXd
(Units: Energy, Format: Range)- Meaning: Determines the damping used across the requested spectral range.
- Usage: Typically this is kept constant. If different values are used, the damping at each energy will be interpolated linearly. This can be useful when poor k-point sampling leads to large oscillations at higher energy.
ETStpsXd
(Units: None, Format: Integer)- Meaning: Number of energy steps in computing X
- Usage: Determines the number of steps in energy the response function/spectrum is computed for in the desired range defined by EnRngeXd. In the case of a full frequency GW the range is fixed by the occupied/empty states included in the calculation, the number of frequency requires a careful check
LongDrXd
(Units: Length, Format: Vector)- Meaning: Electric field direction
- Usage: Pay attention how the system is oriented when treating non 3D systems and choose a direction in the plane/axis where your system lies
FxcGRLc
(Units: , Format: )- Meaning: XC-kernel size
- Usage: Needs convergence study. Much less than FFTGvecs
LRC_alpha
(Units: None, Format: Real)Default: 0.00- Meaning: LRC fitting parameter alpha
- Usage: Long-range tail of the fxc kernel. Depends on the system: the larger the screening the smaller this parameter.
XfnQPdb
SeeKfnQPdb
XfnQP_N
SeeKfnQP_N
XfnQP_E
SeeKfnQP_E
XfnQP_Z
SeeKfnQP_Z
XfnQP_Wv_E
SeeKfnQP_Wv_E
XfnQP_Wv
SeeKfnQP_Wv
XfnQP_Wv_dos
SeeKfnQP_Wv_dos
XfnQP_Wc_E
SeeKfnQP_Wc_E
XfnQP_Wc
SeeKfnQP_Wc
XfnQP_Wc_dos
SeeKfnQP_Wc_dos
DrudeWXd
(Units: Energy, Format: Complex) Verbosity:-V resp
- Meaning: Drude plasmon energy and inverse lifetime.
- Usage:
EhEngyXd
(Units: Energy, Format: Range)Default: (-1,-1) Verbosity:-V resp
- Meaning: Electron-hole energy range
- Usage: An alternative way to BndsRnXd to restrict transitions, but will not reduce memory
DipApproach
(Units: , Format: String)Default: G-space v Verbosity:-V resp
- Meaning: Different ways to calculate dipole matrix elements
- Usage:
X_all_q_ROLEs
(Units: , Format: )- Meaning: CPUs roles (q,k,c,v)
- Usage: MPI-c,v best memory distribution. MPI-k efficient, some memory replication. MPI-q may lead to load unbalance.
Optics/BSE in eh-space
bse
(Units: None, Format: String)- Meaning: Runlevel name: "Bethe Salpeter Equation"
- Usage: Activate with -o b
BSKmod
(Units: None, Format: String)Default: IP- Meaning: Bethe Salpeter kernel
- Usage: Do not set this manually: activate with the appropriate -k <opt> command line option, where opt is one of IP/Hartree/HF/ALDA/SEX.
BEnRange
(Units: Energy, Format: Range)Default: [0:10] eV- Meaning: Energy range for computing the macroscopic dielectric function using BSE
- Usage:
BDmRange
(Units: Energy, Format: Range)Default: (0.10000 , 0.10000)- Meaning: Broadening for the BSE calculation
- Usage: Lorentzian broadening changes linearly between the two values
BEnSteps
(Units: None, Format: Integer)Default: 100- Meaning: Number of evenly spaced energy points in spectrum
- Usage:
BLongDir
(Units: None, Format: Vector)Default: (1,0,0)- Meaning: Direction of the longitudinal perturbation
- Usage:
BSEBands
(Units: None, Format: Range)Default: All bands- Meaning: Bands range: Specifies the band states from which the electron-hole basis of the BSE kernel is constructed
- Usage: Choose few bands close to the Fermi level. Size scales rapidly with the number of bands: BSE is rewritten as an eigenvalue problem for the 2 particle Hamiltonian: size of matrix [Nv x Nc x NKBZ ] x [Nv x Nc x NKBZ]
KfnQPdb
(Units: None, Format: String) Verbosity:-V qp
- Meaning: Database for QP corrections.
- Usage: From a previous GW calculation. An interpolation of the missing QP-values on the basis of the QP-database is available See also:
KfnQP_E
- Format: "<what> < <path>/ndb.QP" with <what> = E,W,Z for QP energy correction, QP width and renormalization factor. For example, from a previous GW calculation use KfnQPdb= "E < ./SAVE/ndb.QP"
KfnQP_E
(Units: eV/None/None, Format: Scissors) Verbosity:-V qp
- Meaning: QP corrections using a scissor operator and stretching coefficients for the conduction/valence bandwidths.
- Usage: Insert values from a previous GW calculation or experiment. This is a lighter way to include GW corrections than KfnQP_E. Format is: scissor See also:
KfnQPdb
DbGdQsize
(Units: None, Format: Real) Verbosity:-V resp
- Meaning: Percentual of the total DbGd transitions to be used
- Usage:
DipApproach
(Units: None, Format: String)Default: G-space v Verbosity:-V resp
- Meaning: how dipoles are calculated:G-space v
- Usage: Options are: G-space v/R-space x/Covariant/Shifted grids
DipPDirect
(Units: None, Format: Flag)Default: off Verbosity:-V resp
- Meaning: Directly compute <v> also when using other approaches for dipoles
- Usage:
ShiftedPaths
(Units: None, Format: String) Verbosity:-V resp
- Meaning: Shifted grids paths (separated by a space)
- Usage:
Gauge
(Units: None, Format: String)Default: length Verbosity:-V resp
- Meaning: Switch between lenght or velocity gauge
- Usage:
NoCondSumRule
(Units: None, Format: Flag)Default: off Verbosity:-V resp
- Meaning: Do not impose the conductivity sum rule in velocity gauge
- Usage:
Reflectivity
(Units: None, Format: Flag)Default: off Verbosity:-V resp
- Meaning: Compute reflectivity at normal incidence
- Usage:
Bethe Salpeter Kernel
bsk
(Units: None, Format: String)- Meaning: Runlevel name: "Bethe Salpeter Equation kernel"
- Usage: Activate with -k <opt>
bss
(Units: None, Format: String)- Meaning: Runlevel name: "Bethe Salpeter Equation solver"
- Usage: Activate with -y <opt>
BSENGexx
(Units: RL/Energy, Format: Integer/Real)- Meaning: G-components to be summed in the Exchange part of the BSE kernel, which takes into account the Local-field effects
- Usage: Small values increase speed. Convergence tests are required.
BSENGBlk
(Units: RL/Energy, Format: Integer/Real)- Meaning: Number of RL-components of the Screened Coulomb Potential matrix W(G,G'), to be included in the sum of the e-h attractive Kernel
- Usage: Try using the diagonal terms only first (BSresKmod BScplKmod variables); use a smaller number than the dimension of the Screened interaction matrix
BSSmod
(Units: None, Format: String)- Meaning: select solver for BSE
- Usage: (h)aydock/(d)iagonalization/(i)nversion/(t)ddft
BSHayTrs
(Units: None, Format: Real)Default: -0.02- Meaning: Threshold for accuracy of the iterative Haydock process
- Usage: Negative sign: average difference, over the energy range, of two consecutive approximations to the spectrum. Positive sign: maximum difference, over the energy range, of two consecutive approximations to the spectrum
BSSInvMode
(Units: None, Format: String)Default: Off- Meaning: select full or perturbative inversion solver for BSE
- Usage: (p) perturbative (f) full
BSEPSInvTrs
(Units: None, Format: Real)Default: 0.01- Meaning: Inversion treshold.
- Usage: Relative[o/o](>0)/Absolute(<0)
BSSInvPFratio
(Units: None, Format: real)- Meaning: Inversion solver. Ratio between the number of frequencies solved pert/full
- Usage:
Non-linear
NLtime
(Units: fs, Format: Real)Default: -1- Meaning: Simulaiton length
- Usage: If negative automatically set the right value for SHG
- This value is invertionaly proportional to NLDamping
NLCorrelation
(Units: , Format: String)Default: IPA (independent particle approximation)- Meaning: Correlation level
- Usage:
HARRLvcs
(Units: , Format: Integer)Default: from ns.ndb1- Meaning: Number of G-vectors in the Hartree
- Usage:
EXXRLvcs
(Units: , Format: Integer)Default: from Collisions- Meaning: Number of G-vectors in the Screened Exchange
- Usage:
ExtF_Dir
(Units: None, Format: Vector)Default: (1,0,0)- Meaning: Direction of the external field
- Usage:
ExtF_kind
(Units: , Format: String)Default: SOFTSIN- Meaning: Field kind
- Usage: Type of external field, for non-linear response only SIN or SOFTSIN
UseDipoles
(Units: , Format: Flag)Default: Off Verbosity:-V nl
- Meaning: Use Covariant Dipoles (just for test purpose)
- Usage: