<div dir="ltr">Many thanks for your replay <br><br><div class="gmail_quote">2010/5/21 Yamit <span dir="ltr"><<a href="mailto:amit99266@rediffmail.com" target="_blank">amit99266@rediffmail.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div><br>
<br>
Dear Mr. Oum Chou<br>
<br>
The input files for graphene is as follows,<br>
<br>
SCF calculation:<br>
<br>
&CONTROL<br>
calculation = 'scf'<br>
restart_mode='from_scratch'<br>
prefix='graphene'<br>
pseudo_dir = $PSEUDO_DIR<br>
outdir = $TMP_DIR<br>
/<br>
&SYSTEM<br>
ibrav=4<br>
celldm(1)=4.6595 <br>
celldm(3)=4.0571 <br>
##(Lattice parameters,a=2.465 A (4.6595 a.u.= experimental value of graphite in-plane lattice constant),and c~10.00A as it is 2D material, do put large vacuum region in z direction to minimize interaction between graphene layers.)<br>
<br>
nat=2<br>
ntyp=1<br>
ecutwfc=40.0<br>
ecutrho=200.0<br>
(#modify ecut according to you psp.)<br>
occupations='smearing' <br>
#(Provide small amount of smearing, as graphene is semi-metallic system.)<br>
smearing='gaussian'<br>
nbnd = 8 <br>
degauss=0.02<br>
/<br>
&ELECTRONS<br>
electron_maxstep = 100<br>
conv_thr = 1.0e-8<br>
/<br>
ATOMIC_SPECIES<br>
C 12.011 C.#your psp file#.UPF <br>
<br>
<br>
ATOMIC_POSITIONS (angstrom)<br>
C 0.000000000 0.000000000 0.000000000<br>
C 1.232850116 0.706423116 0.000000000<br>
<br>
#Do fix C atoms, to obtain C-C bond length ~1.42A<br>
<br>
K_POINTS {automatic}<br>
16 16 1 0 0 0<br>
<br>
#(1 k-point is Z-direction, as large vacuum is there.)<br>
(For DOS calculations use a dense grid of k-points e.g. 32x32x1 or better )<br>
<br>
Run, nscf calculation (by changing calculation = 'nscf' in scf file).<br>
<br>
####################################################################<br>
For DOS calcualtions:<br>
<br>
<a href="http://dos.in" target="_blank">dos.in</a>:<br>
============================<br>
&inputpp<br>
prefix='graphene'<br>
outdir=$TMP_DIR<br>
fildos='graphene.dos'<br>
Emin=-25.0, Emax=20.0, DeltaE=0.1<br>
/<br>
============================<br>
Get Emin & Emax from band structure values.<br>
Just check: "$PATH/espresso-ver/Doc/INPUT_PW.txt" and "$PATH/espresso-ver/Doc/INPUT_DOS.txt" and for details. You can analyse the data in 'graphene.dos', using gnuplot or xmgrace .<br>
<br>
Warm Regards<br>
Amit N. Harode<br>
Applications Group : Computational Materials Simulations<br>
Computational Research Laboratories Ltd.,(CRL INDIA)<br>
Pune - 411004, India.<br>
<br>
On Fri, 21 May 2010 17:19:34 +0530 wrote<br></div></div><div><div></div><div>
> I would like<br>
<br>
to ask you some questions about DOS of graphene. I have some results, I have not found a good results . Could you please given to me the input file for graphene (scf) and (dos)<br>
<br>
<br>
<br>
Many thanks<br>
<br>
<br>
<br>
oum.chou<br>
PhD student at UFR-PHE Rabat<br>
<br></div></div><div>
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<br>
On Fri, 21 May 2010 17:19:34 +0530 wrote<br></div><div><div></div><div>
> I would like<br>
<br>
to ask you some questions about DOS of graphene. I have some results, I have not found a good results . Could you please given to me the input file for graphene (scf) and (dos)<br>
<br>
<br>
<br>
Many thanks<br>
<br>
<br>
<br>
oum.chou<br>
PhD student at UFR-PHE Rabat<br>
<br></div></div><div><div></div><div>
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