<div dir="ltr"><div><div><div>Dear Dr. Sanjeev ,<br></div>Here with I am attaching my i/p. I don't know the necessity of scf i/p for LO-TO calculations at q!=0 cases. If possible, please explain me...<br><br></div><div>
Can Any one Pls suggest me or Answer me regarding q!=0 LO-TO splitting in Quantum espresso.<br></div><div><br></div>with regards<br></div>S. Applakondaiah<br><div><div><div><div><br>&control<br> calculation = 'scf'<br>
restart_mode='from_scratch',<br> prefix='ZnGeP2',<br> tprnfor = .true.<br> pseudo_dir = '../pseudo',<br> outdir='./tmp/'<br> etot_conv_thr = 1.0E-6 ,<br> forc_conv_thr = 1.0D-5 ,<br>
/<br><br> &system<br> ibrav = 7<br> celldm(1) = 10.3888344123,<br> celldm(3) = 1.971766212270,<br> nat = 8<br> ntyp = 3<br> ecutwfc = 35<br>
ecutrho = 600<br> <br> /<br><br> &electrons<br> conv_thr = 1.0d-12<br> /<br><br> ATOMIC_SPECIES<br> Zn 65.39 Zn.pw91-n-van.UPF<br> Ge 72.61 Ge.pw91-n-van.UPF<br> P 30.97 P.pw91-n-van.UPF<br>
<br> ATOMIC_POSITIONS (crystal)<br> Zn 0.000000000 0.000000000 0.000000000<br> Zn 0.500000000 0.750000000 0.250000000<br> Ge 1.000000000 0.500000000 0.500000000<br> Ge 0.500000000 0.250000000 0.750000000<br>
P 0.003266411 0.375000000 0.871733589<br> P 0.496733589 0.128266411 0.125000000<br> P 0.503266411 0.621733589 0.625000000<br> P 0.996733589 0.875000000 0.378266411<br><br> K_POINTS (automatic)<br>
7 7 8 1 1 1<br><br></div></div></div></div></div>