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<div class="moz-cite-prefix">On 3/3/2013 9:58 PM, AJAY SINGH VERMA
wrote:<br>
</div>
<blockquote cite="mid:SNT002-W163766423B2F7D5184E48BEE2FA0@phx.gbl"
type="cite">
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<div dir="ltr">hello all,
<div>can any one tell me how to use supercell calculations for
bulk.</div>
<div>I tried it, for ZnS for which i have 2 atom in unit cell,
made 2X1X1 supercell, the super.struct contains 16
atoms..How??not understanding</div>
<div>Moreover, I had to make changes in it..Let one Zn is
replaced by Indium..The calculation proceeds in a strange
way..calculations give struct file in between init_lapw..
which shows one atom number less than the atoms in the
supercell.struct</div>
<div>1)Is that net considering Indium ?</div>
<div>2)If i had to change the name of the file to ZnSIn after
doping one Indium atom?</div>
<div><br>
</div>
<div>Please help..I am not been able to do
calculations..moreover i dont get a proper tutorial for this?</div>
<div>waiting for the response</div>
<div>Ajay</div>
</div>
<br>
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</pre>
</blockquote>
The supercell can not be the best approach. Try to lower the
symmetry of the unit cell.<br>
If you use the P-42m (111) space group is possible to make
composition variations as Zn4S4, Zn3InS4, Zn2In2S4, Zn1In3S4, In4S4.<br>
Use the above .struct template to generate your alloys. Substitute
Zn by In in the nonequivalent atoms.<br>
The Wien2k will try to revert to the original symmetry when you use
the Zn4S4 and In4S4 compositions! Do not accept.<br>
Gerardo<br>
<br>
ZnS_111
<br>
P LATTICE,NONEQUIV.ATOMS:
4111_P-42m <br>
MODE OF CALC=RELA
unit=ang <br>
10.100590 10.100590 10.100590 90.000000 90.000000
90.000000 <br>
ATOM -1: X=0.00000000 Y=0.00000000 Z=0.00000000<br>
MULT= 1 ISPLIT=-2<br>
ZnZn1 NPT= 781 R0=0.00010000 RMT= 2.3000 Z:
30.0 <br>
LOCAL ROT MATRIX: 1.0000000 0.0000000 0.0000000<br>
0.0000000 1.0000000 0.0000000<br>
0.0000000 0.0000000 1.0000000<br>
ATOM -2: X=0.50000000 Y=0.50000000 Z=0.00000000<br>
MULT= 1 ISPLIT=-2<br>
ZnZn2 NPT= 781 R0=0.00010000 RMT= 2.3000 Z:
30.0 <br>
LOCAL ROT MATRIX: 1.0000000 0.0000000 0.0000000<br>
0.0000000 1.0000000 0.0000000<br>
0.0000000 0.0000000 1.0000000<br>
ATOM -3: X=0.50000000 Y=0.00000000 Z=0.50000000<br>
MULT= 2 ISPLIT= 8<br>
-3: X=0.00000000 Y=0.50000000 Z=0.50000000<br>
ZnZn3 NPT= 781 R0=0.00010000 RMT= 2.3000 Z:
30.0 <br>
LOCAL ROT MATRIX: 1.0000000 0.0000000 0.0000000<br>
0.0000000 1.0000000 0.0000000<br>
0.0000000 0.0000000 1.0000000<br>
ATOM -4: X=0.25000000 Y=0.25000000 Z=0.25000000<br>
MULT= 4 ISPLIT= 8<br>
-4: X=0.25000000 Y=0.75000000 Z=0.75000000<br>
-4: X=0.75000000 Y=0.75000000 Z=0.25000000<br>
-4: X=0.75000000 Y=0.25000000 Z=0.75000000<br>
S S1 NPT= 781 R0=0.00010000 RMT= 2.0400 Z:
16.0 <br>
LOCAL ROT MATRIX: 0.0000000-0.7071068-0.7071068<br>
0.0000000-0.7071068 0.7071068<br>
-1.0000000 0.0000000 0.0000000<br>
8 NUMBER OF SYMMETRY OPERATIONS<br>
-1 0 0 0.00000000<br>
0-1 0 0.00000000<br>
0 0 1 0.00000000<br>
1<br>
-1 0 0 0.00000000<br>
0 1 0 0.00000000<br>
0 0-1 0.00000000<br>
2<br>
0-1 0 0.00000000<br>
-1 0 0 0.00000000<br>
0 0 1 0.00000000<br>
3<br>
0 1 0 0.00000000<br>
-1 0 0 0.00000000<br>
0 0-1 0.00000000<br>
4<br>
0-1 0 0.00000000<br>
1 0 0 0.00000000<br>
0 0-1 0.00000000<br>
5<br>
0 1 0 0.00000000<br>
1 0 0 0.00000000<br>
0 0 1 0.00000000<br>
6<br>
1 0 0 0.00000000<br>
0-1 0 0.00000000<br>
0 0-1 0.00000000<br>
7<br>
1 0 0 0.00000000<br>
0 1 0 0.00000000<br>
0 0 1 0.00000000<br>
8<br>
<br>
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