<div dir="ltr"><div><div>Dear Jiawei,<br><br>Unfortunately, DFPT+U is not in public domain since 2009.<br></div>You may try ABINIT for DFPT+U, if you like. <br><br>Best,<br></div>
Suza<br><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Apr 11, 2014 at 10:41 AM, Andrea Floris <span dir="ltr"><<a href="mailto:an.floris@gmail.com" target="_blank">an.floris@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Dear Jiawei,<br>
The DFPT+U implementation is not yet public. I have recently ported the code in the last version, I am optimizing a couple of routines to calculate the second derivatives of the occupation matrices, which is a rather heavy calculation when using ultrasoft pseudos. In a couple of months it should be available.<br>
Best,<br>
Andrea</p>
<p dir="ltr"></p><div><div class="h5">><br>
> ---------- Forwarded message ----------<br>
> From: Jiawei Zhou (ÖܼÎì¿) <<a href="mailto:zhoujw20@gmail.com" target="_blank">zhoujw20@gmail.com</a>><br>
> Date: Mon, Apr 7, 2014 at 4:54 PM<br>
> Subject: [Pw_forum] Question about GGA+U in DFPT<br>
> To: pw_forum <<a href="mailto:pw_forum@pwscf.org" target="_blank">pw_forum@pwscf.org</a>><br>
> Cc: Jenny Wang <<a href="mailto:jy_wang@mit.edu" target="_blank">jy_wang@mit.edu</a>>, ÑîÔ¶ <<a href="mailto:yangyuan1985@gmail.com" target="_blank">yangyuan1985@gmail.com</a>><br>
><br>
><br>
> Dear all,<br>
> <br>
> I was planning to use ph.x to calculate the phonon dispersion for some transition metal oxide within GGA+U, following the work in a paper (A. Floris et al., Vibrational properties of MnO and NiO from DFT + U-based density functional perturbation theory, PRB, 84 (2011)), which has developed GGA+U for DFPT and implemented for two materials MnO and NiO, and also mentioned that the extension is implemented in the phonon package. However I found the manual for ph.x says:<br>
> <br>
> "The main code ph.x can be used whenever PWscf can be used, with the exceptions of<br>
> DFT+U, nonlocal VdW and hybrid functionals"<br>
> <br>
> So I am confused about whether or not the current phonon package can do a GGA+U calculation? If not, is LDA+U available using ph.x for the phonon dispersion? Or is that part still under development? Thanks so much for your help!<br>
> <br>
> Best,<br>
> <br>
> Jiawei<br>
> Massachusetts Institute of Technology<br>
> <br>
> <br>
><br></div></div>
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