<div dir="ltr"><div><div><div><div><div><div><div><div><br clear="all"></div>Dear experts,<br><br></div> I am interested in calculating the phonon calculation of bcc iron ferrite. I am following the article titled "Thermoelastic properties of alpha-iron from first-principles" authored by Daniele Dragoni, Davide Ceresoli and Nicola Marzari, published in PRB 91, 104105. In that article it is mentioned that, <br><br></div>"Phonon calculations were carried out for each deformation within DFPT. The dynamical matrix and its eigenvalues are calculated on an 4x4x4 mesh of special points in the BZ and Fourier-interpolated on an extended 21x21x21 grid for integration of thermodynamic quantities."<br><br></div> Now I gave the nq1=4, nq2=4, nq3=4 at <a href="http://fe.ph.in">fe.ph.in</a> according to the values mentioned in the article. <br><br></div> But I do not know the parameter for which I have to set the values 21x21x21. Can you kindly let me know the parameter where I have to put the values to set the Fourier-interpolation extension grid for integration of thermodynamic quantities.<br><br></div>Thanking you,<br></div>Yours sincerely,<br></div>Krishnendu<br><div><div><div><div><div><div><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div>Dr. Krishnendu Mukherjee,</div></div><div><br></div><div>Principal Scientist,</div><div>CSIR-NML,</div><div>Jamshedpur.</div></div></div></div></div></div></div></div></div>
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