<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi,<br> Recently,I generate Zn NC-PP using the PP library from qe-forge project.<br>I want to generate Zn.pz-nc.UPF using ld1.x.<br>My Zn.-nc.in is followed:<br><span style="text-decoration: underline;"> &input<br> title='Zn',<br> zed=30.,<br> rel=0,<br> config='[Ar] 4s2.0 4p0.0 3d10.0',<br> iswitch=3,<br> dft='PZ'<br> /<br> &inputp<br> pseudotype=2,<br> file_pseudopw='Zn.pz-nc.UPF',<br> author='TM',<br> lloc=0,<br> nlcc=.true.,<br> tm=.true.<br> /<br>3<br>4P 2 1 0.00 0.00 2.30 2.30 0.0<br>3D 3 2 10.00 0.00 2.30 2.30 0.0<br>4S 1 0 2.00 0.00 2.30 2.30
0.0<br></span><br><br>And I calculate ZnO vc-relax using Zn.pz-nc.UPF and O.pz-mt.UPF,<br>the theory is a=6.223 c/a=1.614, after calculating vc-relax is a=6.191 c/a=1.614 with ecutwfc=62Ry.<br><br>However, No matter how I try to calculate,the phonon frequency is negative<br><br>The scf and ph file is followed:<br>&CONTROL<br> calculation = 'scf' ,<br> restart_mode = 'from_scratch' ,<br> outdir = '/root/ZnO/915-phonon' ,<br> pseudo_dir = '/root/pseudopotential'
,<br> prefix = 'ZnO' ,<br> etot_conv_thr = 1.0D-5 ,<br> forc_conv_thr = 1.0D-4 ,<br> tstress = .true. ,<br> tprnfor = .true. ,<br> /<br> &SYSTEM<br> ibrav = 4,<br> celldm(1) =
6.191,<br> celldm(3) = 1.614,<br> nat = 4,<br> ntyp = 2,<br> ecutwfc = 62 ,<br> /<br> &ELECTRONS<br> conv_thr = 1.0d-10 ,<br> mixing_mode = 'plain'
,<br> mixing_beta = 0.6 ,<br> diagonalization = 'david' ,<br> /<br>ATOMIC_SPECIES<br> Zn 65.40900 Zn.pz-nc.UPF <br> O 15.99940 O.pz-mt.UPF <br>ATOMIC_POSITIONS crystal <br>Zn 0.333333333 0.666666667 -0.000036499 1 1 1<br>Zn 0.666666667 0.333333333 0.499963501 1 1 1<br>O 0.333333333 0.666666667 0.379036499 1 1 1<br>O 0.666666667 0.333333333 0.879036499 1 1 1<br>K_POINTS automatic <br> 4 4 4 1 1
1<br><br><br><br>phonons of ZnO <br> &INPUTPH<br> outdir = '/root/ZnO/915-phonon' ,<br> prefix = 'ZnO' ,<br> fildyn = 'ZnO_IR.dyn' ,<br> fildvscf = 'ZnO.dv'
,<br> ldisp = .true.,<br> nq1 = 4 ,<br> nq2 = 4 ,<br> nq3 = 4 ,<br> epsil = .false.,<br> elph =
.false.,<br> fpol = .false. ,<br> recover = .false. ,<br> amass(1) = 65.4090,<br> amass(2) = 15.9994,<br> tr2_ph = 1.0d-12 ,<br> /<br><br>Best<br>Regards<br>Yun Song,Kang<br>
Department Physical Science and Technology of Inner Mongolia University.</td></tr></table>