<div dir="ltr">Hi,<br><div><br></div><div>Thank you so much for your suggested paper and opinion!</div><div><br></div><div>Best</div><div>Jahid</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jun 8, 2024 at 9:31 PM Kazume NISHIDATE <<a href="mailto:nisidate@iwate-u.ac.jp">nisidate@iwate-u.ac.jp</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">Dear Jahid Hasan<br>
<br>
I don't use cp.x and the following are just general notes for users.<br>
In the Parrinello-Rahman method, we can define a fictional "temperature" for the cell. Refer to equation (3) in the article [1]. The third term on the right-hand side corresponds to the kinetic energy of the cell. As a result, we can determine the "cell temperature." You can also control it using an appropriate temperature control method. The cell temperature is not a true measure of temperature, but can be adjusted to reach a stable state gradually.<br>
<br>
<br>
[1] M. Parrinello and A. Rahman, Phys. Rev. Lett. 45 (1980) 1196.<br>
<br>
> 2024/06/09 6:10、Md. Jahid Hasan Sagor <<a href="mailto:md.sagor@maine.edu" target="_blank">md.sagor@maine.edu</a>>のメール:<br>
> <br>
> Hi,<br>
> <br>
> To extract lattice parameters of Si/GaAs at finite temperature, we can apply NPT (vc-cp) using CPMD. My question is, do we have to set the desired finite temperature at both of &ION and &CELL card? <br>
> <br>
> To me, Only set temperature under &ION card should be enough, as I am thinking only ion is the physical quantities. Do you have other opinions for this?<br>
> <br>
> I tried NPT for Silicon and after 60000 steps, I have found that CELL temperature is not converging at the set temperature under &CELL card, but &ION temperature converged within 3000 steps.<br>
> <br>
> Please advise me if I am wrong.<br>
> <br>
> Thank you<br>
> <br>
> Best<br>
> Md Jahid Hasan<br>
> PhD Student<br>
> Mechanical Engineering<br>
> University of Maine <br>
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<br>
<br>
西館数芽<br>
Kazume NISHIDATE Ph.D<br>
<br>
Department of Systems Innovation Engineering,<br>
Graduate School of Science and Engineering, Iwate University<br>
4-3-5 Ueda, Morioka, Iwate, 020-8551 JAPAN<br>
Phone:+81-19-621-6391<br>
<a href="mailto:kazume.nishidate@gmail.com" target="_blank">kazume.nishidate@gmail.com</a>, <a href="mailto:nisidate@iwate-u.ac.jp" target="_blank">nisidate@iwate-u.ac.jp</a><br>
<a href="https://sites.google.com/site/nisidatelab/" rel="noreferrer" target="_blank">https://sites.google.com/site/nisidatelab/</a><br>
<br>
_______________________________________________<br>
The Quantum ESPRESSO community stands by the Ukrainian<br>
people and expresses its concerns about the devastating<br>
effects that the Russian military offensive has on their<br>
country and on the free and peaceful scientific, cultural,<br>
and economic cooperation amongst peoples<br>
_______________________________________________<br>
Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu" rel="noreferrer" target="_blank">www.max-centre.eu</a>)<br>
users mailing list <a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a><br>
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