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<DIV>Dear all,<BR> <BR> I encounter difficulty in performing electron-phonon </DIV>
<DIV>coupling (EPC) on a supercell. Take NaCl as a example,</DIV>
<DIV> I construct a 2*2*2 supercell in the unit of the NaCl primitive</DIV>
<DIV> cell, which has 16 atoms. But the supercell has a P1 space </DIV>
<DIV>group. We all kown that the EPC is very time-consuming. Time to </DIV>
<DIV>perform a EPC on such a supercell will be unbearable. What can</DIV>
<DIV> I do to handle such a problem?<BR> <BR> My second question is how much the k-mesh should choose</DIV>
<DIV> for such a supercell when do the EPC calculation ? Could someone</DIV>
<DIV> give some empirical advice ? <BR> <BR> Any reply will be appreciated!<BR> <BR> <BR></DIV>
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