<p dir="ltr">Dear Aidin,<br>
Add some seamering value bcoz I think it might shows metallic nature.</p>
<div class="gmail_quote">On 15-Feb-2015 5:03 PM, "Aidin Bahrami" <<a href="mailto:aidinbh2010@gmail.com">aidinbh2010@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><pre style="font-family:courier,'courier new',monospace;font-size:14px;white-space:pre-wrap;word-wrap:break-word;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);line-height:19.6000003814697px">Dear all,
I want to optimize the geometry of an SnO2 unit cell ( The geometry and cell dimensions). But, it doesn't converge even after 1000 steps. Could
you give me some suggestions? Any suggestions are welcome!</pre><div><br></div><div><pre style="font-family:courier,'courier new',monospace;font-size:14px;white-space:pre-wrap;word-wrap:break-word;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);line-height:19.6000003814697px">I am very thankful any to solve this problem.</pre><pre style="word-wrap:break-word;margin-top:0px;margin-bottom:0px"><font color="#000000" face="courier, courier new, monospace"><span style="font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap">
</span></font><pre style="color:rgb(0,0,0);font-family:courier,'courier new',monospace;font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap;word-wrap:break-word;margin-top:0px;margin-bottom:0px">Attached below is the input file:</pre><pre style="color:rgb(0,0,0);font-family:courier,'courier new',monospace;font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap;word-wrap:break-word;margin-top:0px;margin-bottom:0px"><br></pre><pre style="word-wrap:break-word;margin-top:0px;margin-bottom:0px"><font color="#000000" face="courier, courier new, monospace"><span style="font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap">&control
calculation='relax'
prefix = 'SnO2UC' ,
pseudo_dir = "/home/aidin/Work/Pseudo",
outdir = "/home/aidin/Work/tempdir",
/
&system
ibrav= 0,
nat= 6,
ntyp= 2,
ecutwfc =33.0,
ecutrho =300.0,
occupations='fixed',
/
&electrons
diagonalization='david',
conv_thr = 1.D-7,
mixing_beta = 0.3,
electron_maxstep=5000,
/
&IONS
ion_dynamics = 'bfgs',
/
ATOMIC_SPECIES
Sn 195.08 Sn.pbe-mt_fhi.UPF
O 15.9994 O.pbe-mt_fhi.UPF.UPF
CELL_PARAMETERS {angstrom}
2.64660710 0.00000000 0.00000000
0.00000000 6.38890841 0.00000000
0.00000000 0.00000000 15.00000000
ATOMIC_POSITIONS {angstrom}
Sn 0.51714893 3.87377899 1.80974824
O 2.11190545 3.86421764 3.11002137
O 0.53756837 1.81823266 1.75930720
O 0.49229597 5.92499155 1.85643211
O 2.11263443 3.92197449 0.52041771
Sn 2.14332255 0.54183064 1.73115747
K_POINTS {automatic}
10 10 1 0 0 0 </span></font><span style="color:rgb(0,0,0);font-family:courier,'courier new',monospace;font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap">
</span></pre><div style="color:rgb(0,0,0);font-family:courier,'courier new',monospace;font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap"><br></div><font color="#000000" face="courier, courier new, monospace"><span style="font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap">
Thanks in advance
A.Bahrami</span></font></pre><pre style="font-family:courier,'courier new',monospace;font-size:14px;white-space:pre-wrap;word-wrap:break-word;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0);line-height:19.6000003814697px">Ph.D of chemistry
University of Tarbiat modares
Tehran
Iran</pre></div></div>
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