Dear PWSCF users,<br>
I have done a 'nscf' calculation to get
the band structure. The number of bands is 280 and the number of
irreducible k points is 10. The input file is attached below. In the
output file I got some warning messages like:<br>
<br>
WARNING: 3 eigenvalues not converged<br>
WARNING: 3 eigenvalues not converged<br>
WARNING: 139 eigenvalues not converged<br>
WARNING: 2 eigenvalues not converged<br>
WARNING: 143 eigenvalues not converged<br>
WARNING: 3 eigenvalues not converged<br>
WARNING: 1 eigenvalues not converged<br>
WARNING: 1 eigenvalues not converged<br>
WARNING: 140 eigenvalues not converged<br>
WARNING: 13 eigenvalues not converged<br>
WARNING: 1 eigenvalues not converged<br>
<br>
The band structure is finally calculated at the end of output file but
shall I believe in these E_{nk} values? How can I get rid of these
warning messages? <br>
Thank you very much.<br>
<br>
The input file is as follows:<br>
&CONTROL<br>
calculation='nscf'<br>
wf_collect=.true.<br>
pseudo_dir = '../psp'<br>
outdir='.'<br>
wfcdir='/scratch'<br>
prefix='IF-relax'<br>
disk_io='low'<br>
verbosity='low'<br>
tprnfor = .true.<br>
tstress = .true.<br>
dt=80.D0<br>
/<br>
&SYSTEM<br>
ibrav= 6<br>
celldm(1) = 7.27<br>
celldm(3) = 17.0<br>
nat= 67<br>
ntyp= 5<br>
nbnd = 280<br>
ecutwfc = 30.0<br>
ecutrho = 180.0<br>
occupations='smearing'<br>
smearing='gauss'<br>
degauss=0.03<br>
/<br>
&ELECTRONS<br>
diagonalization='david'<br>
mixing_beta = 0.7D0<br>
diago_david_ndim = 4<br>
mixing_mode= 'local-TF'<br>
electron_maxstep = 300<br>
conv_thr = 1.D-8<br>
/<br>
ATOMIC_SPECIES<br>
La 138.91 057-La-ca-nsp-hanghui.uspp.format.UPF<br>
Al 26.98 013-Al-ca--hanghui.uspp.format.UPF<br>
Sr 87.62 038-Sr-ca-sp-vgrp.uspp.format.UPF<br>
Ti 47.90 022-Ti-ca-sp-vgrp.uspp.format.UPF<br>
O 16.00 008-O-ca--vgrp.uspp.format.UPF<br>
ATOMIC_POSITIONS alat<br>
Sr 0.000000000 0.000000000 0.0 0 0 0<br>
O 0.500000000 0.500000000 0.0 0 0 0<br>
Ti 0.500000000 0.500000000 0.5 0 0 0<br>
O 0.500000000 0.000000000 0.5 0 0 0<br>
O 0.000000000 0.500000000 0.5 0 0 0<br>
Sr 0.000000000 0.000000000 1.0 0 0 0<br>
O 0.500000000 0.500000000 1.0 0 0 0<br>
Ti 0.500000000 0.500000000 1.5 0 0 0<br>
O 0.500000000 0.000000000 1.5 0 0 0<br>
O 0.000000000 0.500000000 1.5 0 0 0<br>
Sr 0.000000000 0.000000000 2.004036406 1 1 1<br>
O 0.500000000 0.500000000 2.007944928 1 1 1<br>
Ti 0.500000000 0.500000000 2.508029381 1 1 1<br>
O 0.500000000 0.000000000 2.513722783 1 1 1<br>
O 0.000000000 0.500000000 2.513722783 1 1 1<br>
Sr 0.000000000 0.000000000 3.011035804 1 1 1<br>
O 0.500000000 0.500000000 3.017938555 1 1 1<br>
Ti 0.500000000 0.500000000 3.515462896 1 1 1<br>
O 0.500000000 0.000000000 3.523810273 1 1 1<br>
O 0.000000000 0.500000000 3.523810273 1 1 1<br>
......
<br>
<br>
K_POINTS {automatic}<br>
6 6 1 0 0 0<br>
<br>
<br>