View source for Truncated Coulomb Potential in 2D

===Generation of a truncated Coulomb Potential for a 2D material===
To simulate a real isolated 2D-layer convergence with vacuum size should be required.
The use of a truncated Coulomb potential allows to achieve faster convergence in the vacuum size, eliminating the interaction between the repeated 
images. (see ref. Varsano)
For a 2D system a box-like cutoff in the direction perperdicular to the sheet (in this case z) is applied.
The used box size  L_z = a_z (cell size in bohr) - 1 bohr = 32 bohr

Create the input file:

 $ yambo -F 01_wcut.in  -r
Open the input file 01_cutoff.in

Change the variables inside as:

 RandQpts= 1000000          # [RIM] Number of random q-points in the BZ
 RandGvec= 100        RL    # [RIM] Coulomb interaction RS components

 CUTGeo= "box z"            # [CUT] Coulomb Cutoff geometry: box/cylinder/sphere X/Y/Z/XY..
 % CUTBox
  0.00     | 0.00     | 32.0    |        # [CUT] [au] Box sides


Close the input file and run yambo
 $ yambo -F 01_wcut.in