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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman" size=3>Dear all,</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT face="Times New Roman" size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>I encounter difficulty in performing electron-phonon coupling (EPC) on a supercell. Take NaCl as a example, I construct a 2*2*2 supercell in the unit of the NaCl primitive cell, which has 16 atoms. But the supercell has a P1 space group. We all kown that the EPC is very time-consuming. Time to perform a EPC on such a supercell will be unbearable. What can I do to handle such a problem?</FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman" size=3> </FONT></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>My second question is how much the k-mesh should choose for such a supercell when do the EPC calculation ? Could someone give some empirical advice ? </FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman" size=3> </FONT></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN>Any reply will be appreciated!</FONT></FONT></SPAN></P></DIV>
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