<P>
<BR>
<BR>
Dear all and Dr. Alberto Debernardi<BR>
<BR>
i am learning band structure for half metallic ferromagnets. To start with i am trying to do for NiMnSb (debernardi etal Volume 23, Issues 6-8, 15 December 2003, Pages 743-746). i used the same pseudo potential and k_points grid but i am not able to reproduce the band structure.<BR>
<BR>
the problems i faced<BR>
<BR>
1. fluctuations in the convergence (despite 20% increase of the # of bands)<BR>
2. all the bands are concentrated within 5 ev which is different from the Dr. Alberto paper.<BR>
<BR>
3. i got half-metallic gap of ~ 1.2 ev <BR>
<BR>
i dont know whether i am going in the right direction. <BR>
<BR>
Here with i am giving the input file plz correct me if i had committed blunders in the input file.<BR>
&control<BR>
calculation='scf'<BR>
restart_mode='from_scratch',<BR>
pseudo_dir = '/usr/local/espresso-3.2.3/pseudo/',<BR>
outdir='/home/mmm-lab/tmp/'<BR>
prefix='nimnsb-example'<BR>
<BR>
/<BR>
&system<BR>
ibrav=2, celldm(1) =10.77, nat=3, ntyp=3,<BR>
nspin = 2, ecutwfc = 35.0, ecutrho = 560.0, nelec=22, tot_magnetization=4,<BR>
occupations='smearing', smearing='methfessel-paxton', degauss=0.02<BR>
/<BR>
&electrons<BR>
diagonalization='david'<BR>
conv_thr = 1.0e-6<BR>
mixing_beta = 0.7 <BR>
/<BR>
ATOMIC_SPECIES<BR>
Ni 58.69 Ni_ps.uspp.UPF<BR>
Mn 54.93 Mn_KB_LDA.uspp.UPF <BR>
Sb 121.76 Sb.pz-bhs.UPF<BR>
<BR>
ATOMIC_POSITIONS<BR>
Mn 0.25 0.25 0.25<BR>
Ni 0.0 0.0 0.0<BR>
Sb 0.75 0.75 0.75<BR>
K_POINTS {automatic}<BR>
8 8 1 0 0 0 <BR>
<BR>
</P>
With regards
<br>
<br>
K. Ramesh Kumar
<br>
Research Scholar
<br>
Department of Physics
<br>
IIT-Madras
<br>
Chennai-600 036<br><br>