<div dir="ltr"><div>Hi,</div><div>You can follow this link</div><div><a href="https://lists.quantum-espresso.org/pipermail/users/2019-February/042098.html">https://lists.quantum-espresso.org/pipermail/users/2019-February/042098.html</a></div><div><br></div><div>Thanks,</div><div>Rita</div><div>----------------------------------------<br></div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><span style="font-family:georgia,serif">Rita Maji</span></div><div><span style="font-family:georgia,serif">Research scholar</span></div><div><span style="font-family:georgia,serif">School of Physical Sciences</span></div><div><span style="font-family:georgia,serif">National Institute of Science Education and Research</span></div><div><span style="font-family:georgia,serif">Bhubaneswar, 752050</span></div><div><span style="font-family:georgia,serif">Odisha, India</span><br></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 21, 2020 at 1:17 PM <<a href="mailto:ykhuang@dicp.ac.cn">ykhuang@dicp.ac.cn</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Greetings, QE users,<div>Recently I plan to perform absorption free energy calculation and frequency analysis on CO molecule that absorbed on slab. </div><div>However, there're 80 atoms in total (including slab atoms), which means a quite large calculation comparing to examples provided. The vibration information of slab is unnecessary, but it will take quite long time to finish the whole process. </div><div>I remember that in VASP, frequency calculation can run with some atom fixed. I have read the input description of ph.x but failed to find command lines about how to fix some atoms.</div><div>Could someone give me some suggestions on how I can fix some atoms in phonon calculation, or, how I can simplify the calculation?</div><div><br></div><div>Any suggestion will be appreciated.</div><div><br></div><div>Yike Huang, PhD candidate.</div><div>Dalian Institute of Chemical Physics.</div><div><br></div>_______________________________________________<br>
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