<div dir="ltr"><div><div>Dear Anik, I suspect your input is ibrav= 4,celldm(1)=10 ,celldm(3)=5.7, instead of what you want for lattice is 8.73 and c/a ratio is 0.576.<br></div>in my view celldm(1)=10 au and celldm(3) is c/a i.e 5.7 which is very large as you wanted 0.576.<br>
</div>so see the input file and try to see the structure of the input.<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Nov 12, 2013 at 4:31 PM, Anik Shrivastava <span dir="ltr"><<a href="mailto:anikshrivastava05@gmail.com" target="_blank">anikshrivastava05@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hii<br>
I am trying scf calculation for single boron atom and trying to fix<br>
lattice constant as boron standard lattice constant for tetragonal(or<br>
rhombohedral) lattice is 8.73 and c/a ratio is 0.576,but when i check<br>
E-V curve it shows straight line or similar pattern, can anyone tell<br>
wats wrong with my inputs<br>
these are<br>
<br>
&control<br>
<br>
calculation='scf'<br>
<br>
pseudo_dir = '/home/metal/Desktop/espresso-5.0.2/pseudo/',<br>
<br>
outdir='/home/metal/tmp/'<br>
<br>
prefix='b'<br>
<br>
/<br>
<br>
&system<br>
<br>
ibrav= 4,celldm(1)=10 ,celldm(3)=5.7, nat= 1, ntyp= 1,<br>
<br>
ecutwfc =35.0,ecutrho=420, occupations='smearing',<br>
smearing='gaussian', degauss=0.02<br>
<br>
/<br>
<br>
&electrons<br>
<br>
diagonalization='cg'<br>
<br>
conv_thr = 1.0e-8<br>
<br>
mixing_beta = 0.7<br>
<br>
<br>
/<br>
<br>
ATOMIC_SPECIES<br>
<br>
B 10.81 B.pz-n-rrkjus_psl.0.1.UPF<br>
<br>
ATOMIC_POSITIONS<br>
<br>
B 0.00 0.00 0.00<br>
<br>
K_POINTS(automatic)<br>
<br>
4 4 1 0 0 0<br>
<br>
<br>
<br>
<br>
Anik shrivastava<br>
Senior Research Fellow<br>
Naval Materials Research Lab,DRDO<br>
Mumbai-400085<br>
India<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">Thanks and Regards<br>Bramha Prasad Pandey<br>GLA University<br>Mathura (U.P)<br>INDIA.<br></div>
</div>