<div dir="ltr"><div>Dear pwscf users and developpers, <br><br></div><div>Best wishes for the New Year! <br></div><div><br></div>I have trouble with phonon calculations on magnetic insulators: the calculations works well at gamma (k=0) point, and I am able to compute dielectric tensor and effective charges, but as soon as I try out of the zone center, the calculation never works, with errors such as (in the ph output): <br><br>------------------------------<wbr>------------------------------<wbr>---------------------------<br> Representation # 1 mode # 1<br><br> Self-consistent Calculation<br> kpoint 1 ibnd 75 solve_linter: root not converged 1.071E-01<br> kpoint 2 ibnd 75 solve_linter: root not converged 1.924E-01<br> kpoint 3 ibnd 75 solve_linter: root not converged 1.745E-02<br> kpoint 4 ibnd 75 solve_linter: root not converged 1.722E-01<br>------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>-<br clear="all"><div><div><br></div><div>On the other hand, when I do the very same calculation, but just changing the insulator state to a metallic state (in the preceeding scf step, that is), then the calculation goes perfectly well. Is there a particular reason why that shouldn't work? The electronic bands show that this system is indeed an insulator with a significant gap. <br><br></div><div>Thank you very much for your help,<br><br></div><div>Best Regards, <br><br></div><div>Merlin Méheut<br></div><div><br></div><div>1/ scf input for insulator state:<br>&system<br> ibrav =0,<br> celldm(1) = 12.459185,<br> nat =20, ntyp = 4,<br> ecutwfc =80.0, ecutrho = 320.0,<br> nspin=2, starting_magnetization(1)=0.5,<br> tot_magnetization=4,<br>/&end<br><br></div><div>2/ for metallic state<br></div><div>&system<br> ibrav =0,<br> celldm(1) = 12.459185,<br> nat =20, ntyp = 4,<br> ecutwfc =80.0, ecutrho = 320.0, <br> nspin=2, starting_magnetization(1)=0.5,<br> occupations='smearing', smearing='mp', degauss=0.04,<br>/&end<br><br></div><div>3/ phonon input: <br>&inputph<br> amass(1)=57.9353,<br> amass(2)=39.9626,<br> amass(3)=27.9769,<br> amass(4)=15.9949,<br> alpha_mix(1) = 0.5,<br> ! ldisp=.true., nq1=2, nq2=3, nq3=2,<br> tr2_ph = 1.0D-17,<br> prefix='NiCPX',<br> fildyn='mat.$PREFIX',<br> lraman=.false.,<br> epsil =.false.,<br> trans =.true.,<br> zue = .false.,<br> zeu= .false.,<br> outdir='/tmpdir/$LOGNAME/'<br>/&end<br> -0.0006214 -0.0004751 -0.5041257<br><br></div><div><br>-- <br><div class="gmail-m_2827493750489094115gmail-m_-2626443323123650728gmail_signature"><div dir="ltr">Merlin Méheut<br>adresse labo:<br>GET - OMP - Université Paul Sabatier <br>14 avenue Edouard Belin<br>31400 Toulouse<br>FRANCE <br>tel: <a href="tel:+33%205%2061%2033%2026%2017" value="+33561332617" target="_blank">(+33) 5 61 33 26 17</a><br><br></div></div>
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