<div dir="ltr"><div>You might compute the effective charges with the phonon code (the Grimme term does not affect them) and the phonon displacements with the finite-displacement (or frozen-phonon) code that you can find in PHonon/FD/<br><br></div>Paolo<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 14, 2016 at 9:01 AM, <a href="mailto:liyincumt@gmail.com">liyincumt@gmail.com</a> <span dir="ltr"><<a href="mailto:liyincumt@gmail.com" target="_blank">liyincumt@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div><span></span>Dear QE community,</div><div><br></div><div>My pwscf calculate involves vdW correction item using "<span style="font-family:'';font-size:10.5pt;line-height:1.5;background-color:window">vdw_corr = 'grimme-d2'</span><span style="font-size:10.5pt;line-height:1.5;background-color:window">". The ph.x cannot implement any calculation where vdW-correction is present. But I need to calculate infrared spectrum of my crystal. </span><span style="font-size:10.5pt;line-height:1.5;background-color:window">Therefore, </span><span style="font-size:10.5pt;line-height:1.5;background-color:window">I am looking for a program to calculate infrared spectra based on berry phase method (as far as I know, it is also called finite displacement method) within Quantum espresso package. Does anybody know about it? </span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window"><br></span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window">Best Regards,</span></div><div><span style="font-size:10.5pt;line-height:1.5;background-color:window">Yin</span></div><hr style="width:210px;min-height:1px" size="1" align="left" color="#b5c4df">
<div><span><div style="margin:10px;font-family:verdana;font-size:15px"><span style="color:rgb(0,0,0);background-color:rgba(0,0,0,0)">Dr. Yin Li <br>Department of Biophysics,Medical School, University of Pecs,<br>No.12 Szigeti Street, Pecs, H-7624, HUNGARY<br>Phone: <a href="tel:%2B36-72-535271" value="+3672535271" target="_blank">+36-72-535271</a>/36271</span></div></span></div>
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