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	<id>https://wiki.yambo-code.eu/wiki/index.php?action=history&amp;feed=atom&amp;title=Coulomb_2D</id>
	<title>Coulomb 2D - Revision history</title>
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	<updated>2026-07-01T22:48:08Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.yambo-code.eu/wiki/index.php?title=Coulomb_2D&amp;diff=291&amp;oldid=prev</id>
		<title>Maurizia: Created page with &quot;==Generation of a truncated Coulomb Potential for 2D Material==== To simulate a real isolated 2D-layer convergence with vacuum size should be required. The use of a truncated...&quot;</title>
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		<updated>2017-03-15T16:35:02Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;==Generation of a truncated Coulomb Potential for 2D Material==== To simulate a real isolated 2D-layer convergence with vacuum size should be required. The use of a truncated...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Generation of a truncated Coulomb Potential for 2D Material====&lt;br /&gt;
To simulate a real isolated 2D-layer convergence with vacuum size should be required.&lt;br /&gt;
The use of a truncated Coulomb potential allows to achieve faster convergence in the vacuum size, eliminating the interaction between the repeated &lt;br /&gt;
images. (see ref. Varsano)&lt;br /&gt;
&lt;br /&gt;
Create the input file:&lt;br /&gt;
&lt;br /&gt;
 $ yambo -F 01_wcut.in  -r&lt;br /&gt;
Open the input file 01_wcut.in&lt;br /&gt;
&lt;br /&gt;
Change the variables inside as:&lt;br /&gt;
&lt;br /&gt;
RandQpts= 1000000          # [RIM] Number of random q-points in the BZ&lt;br /&gt;
RandGvec= 100        RL    # [RIM] Coulomb interaction RS components&lt;br /&gt;
CUTGeo= &amp;quot;box z&amp;quot;            # [CUT] Coulomb Cutoff geometry: box/cylinder/sphere X/Y/Z/XY..&lt;br /&gt;
% CUTBox&lt;br /&gt;
 0.00     | 0.00     | 32.00     |        # [CUT] [au] Box sides&lt;br /&gt;
&lt;br /&gt;
Close the input file and run yambo&lt;br /&gt;
 $ yambo -F 01_wcut.in&lt;/div&gt;</summary>
		<author><name>Maurizia</name></author>
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