<div dir="ltr">Hi,<div><br></div><div>Thank you for your response. So, if I use the CIF files cell structure (@298 K), and run the QE without optimizing the atoms position/Unit cell, the output of QE will be at that temperature (@298K), right?. However, if I optimize the cell structure/atom position using <a href="http://vc-relax.in/relax.in">vc-relax.in/relax.in</a>, the output of QE will be at 0 K ?</div><div><br></div><div>Thanks!</div><div><br></div><div>Best</div><div>Md Jahid Hasan</div><div>PhD Student</div><div>University of Maine</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 16, 2024 at 11:42 AM Husak Michal via users <<a href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</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">Data obtained by vc-relax corresponds to 0 K.<br>
Data obtained by relax with RT cell parameters fixed corresponds<br>
to not relaxed QM minimum with undefined temperature.<br>
To describe correctly structure at given temperature you must use quantum<br>
dynamic calculations ...<br>
<br>
Michal Husak<br>
UCT Prague<br>
________________________________<br>
From: users <<a href="mailto:users-bounces@lists.quantum-espresso.org" target="_blank">users-bounces@lists.quantum-espresso.org</a>> on behalf of Md. Jahid Hasan Sagor <<a href="mailto:md.sagor@maine.edu" target="_blank">md.sagor@maine.edu</a>><br>
Sent: Thursday, May 16, 2024 4:34:41 PM<br>
To: Quantum ESPRESSO users Forum<br>
Subject: [SPAM] [QE-users] temperature of the output electronic properties in QE<br>
<br>
Hi,<br>
<br>
What's the temperature of the output electronic properties, even if we use 298 K cell info (atom position) as an input?<br>
Normally to prepare input file (structure of materials) for QE, I searched the corresponding CIF file from this website (<a href="http://www.crystallography.net/cod/result.php" rel="noreferrer" target="_blank">http://www.crystallography.net/cod/result.php</a>), after that I use Vesta to get the relevant atomic positions and lattice parameter. I have a question regarding that. Most of the CIF files cell temperature are at 298 K, so if we use the structural data from that CIF (298 K) and run QE( after performing Optimizing atomic positions (<a href="http://relax.in" rel="noreferrer" target="_blank">relax.in</a><<a href="http://relax.in" rel="noreferrer" target="_blank">http://relax.in</a>>), optimizing Unit cell (<a href="http://vc-relax.in" rel="noreferrer" target="_blank">vc-relax.in</a><<a href="http://vc-relax.in" rel="noreferrer" target="_blank">http://vc-relax.in</a>>)) to find electronic properties (e.g, density of states, fermi level), Are the output data of QE represent the temperature of 0 K?<br>
<br>
Thanks<br>
<br>
Best<br>
Md Jahid Hasan<br>
PhD Student<br>
University of Maine<br>
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