[Pw_forum] zns/zno surface

Amin Torabi mtorabi at uwo.ca
Fri Aug 10 18:22:55 CEST 2012


Dear PWSCF experts,

I am willing to find out how doping of oxygen in a surface of ZnS
(wurtzite) changes its band structure. I have a slab model composed of 8
layers of ZnS, in which 2 sulfur atoms are replace with oxygen, and a 15
Angstrom vacuum on top of the surface. I am relaxing only the first two
layers.
Now, my question is the sulfur or oxygen atoms on the top level resembles
the surface that I am interested in; however, the sulfur (or zinc) atoms at
the bottom are artifact of the model. How should I saturate them?

Can you please take a look on my input file and let me know if you have any
suggestion? Thanks

&CONTROL
        calculation     = 'relax'
        prefix          = 'orig'
        pseudo_dir      = '/home/p/'
        outdir          = './tmp'
        tstress         = .true
        tprnfor         = .true
/
&SYSTEM
        ibrav         = 12
A = 11.3772
B = 11.3772
 C = 40.0
cosAB = -0.5
        nat            = 153
        ntyp          = 3
        ecutwfc     = 30
        ecutrho     = 300
occupations = 'smearing'
 degauss = 0.01
smearing = 'gauss'
/
&ELECTRONS
        mixing_mode     = 'local-TF'
        mixing_beta     = 0.3
/
&IONS
/
ATOMIC_SPECIES
 Zn 65.409 Zn.pbe-van.UPF
 S  32.066 S.pbe-van_bm.UPF
 O  15.9994 O.pbe-van_ak.UPF
ATOMIC_POSITIONS angstrom
Zn      1.896209796     1.094779514     3.1132225450 0 0 0
S       0.000002678     2.189555203     2.3306235650 0 0 0
S       1.896209090     1.094779922     5.4413927710 0 0 0
Zn      0.000001973     2.189555611     6.2239919760 0 0 0
Zn      1.896209796     1.094779514     9.3347611820 0 0 0
S       0.000002678     2.189555203     8.5521622020 0 0 0
S       1.896209090     1.094779922     11.662931408 0 0 0
Zn      0.000001973     2.189555611     12.445530613 0 0 0
Zn      1.896209796     1.094779514     15.556299819 0 0 0
S       0.000002678     2.189555203     14.773700839 0 0 0
S       1.896209090     1.094779922     17.884470045 0 0 0
Zn      0.000001973     2.189555611     18.667069250 0 0 0
Zn      1.896209796     1.094779514     21.777838456
S       0.000002678     2.189555203     20.995239476
S       1.896209090     1.094779922     24.106008682
Zn      0.000001973     2.189555611     24.888607887
S       0.000002678     2.189555203     27.216778113
Zn      0.000005649     4.379109319     3.1132225450 0 0 0
S       -1.896201469    5.473885008     2.3306235650 0 0 0
S       0.000004943     4.379109727     5.4413927710 0 0 0
Zn      -1.896202174    5.473885416     6.2239919760 0 0 0
Zn      0.000005649     4.379109319     9.3347611820 0 0 0
S       -1.896201469    5.473885008     8.5521622020 0 0 0
S       0.000004943     4.379109727     11.662931408 0 0 0
Zn      -1.896202174    5.473885416     12.445530613 0 0 0
Zn      0.000005649     4.379109319     15.556299819 0 0 0
S       -1.896201469    5.473885008     14.773700839 0 0 0
S       0.000004943     4.379109727     17.884470045 0 0 0
Zn      -1.896202174    5.473885416     18.667069250 0 0 0
Zn      0.000005649     4.379109319     21.777838456
S       -1.896201469    5.473885008     20.995239476
S       0.000004943     4.379109727     24.106008682
Zn      -1.896202174    5.473885416     24.888607887
S       -1.896201469    5.473885008     27.216778113
Zn      -1.896198498    7.663439124     3.1132225450 0 0 0
S       -3.792405616    8.758214813     2.3306235650 0 0 0
S       -1.896199204    7.663439532     5.4413927710 0 0 0
Zn      -3.792406321    8.758215221     6.2239919760 0 0 0
Zn      -1.896198498    7.663439124     9.3347611820 0 0 0
S       -3.792405616    8.758214813     8.5521622020 0 0 0
S       -1.896199204    7.663439532     11.662931408 0 0 0
Zn      -3.792406321    8.758215221     12.445530613 0 0 0
Zn      -1.896198498    7.663439124     15.556299819 0 0 0
S       -3.792405616    8.758214813     14.773700839 0 0 0
S       -1.896199204    7.663439532     17.884470045 0 0 0
Zn      -3.792406321    8.758215221     18.667069250 0 0 0
Zn      -1.896198498    7.663439124     21.777838456
S       -3.792405616    8.758214813     20.995239476
S       -1.896199204    7.663439532     24.106008682
Zn      -3.792406321    8.758215221     24.888607887
S       -3.792405616    8.758214813     27.216778113
Zn      5.688625711     1.094783325     3.1132225450 0 0 0
S       3.792418593     2.189559014     2.3306235650 0 0 0
S       5.688625005     1.094783733     5.4413927710 0 0 0
Zn      3.792417888     2.189559422     6.2239919760 0 0 0
Zn      5.688625711     1.094783325     9.3347611820 0 0 0
S       3.792418593     2.189559014     8.5521622020 0 0 0
S       5.688625005     1.094783733     11.662931408 0 0 0
Zn      3.792417888     2.189559422     12.445530613 0 0 0
Zn      5.688625711     1.094783325     15.556299819 0 0 0
S       3.792418593     2.189559014     14.773700839 0 0 0
S       5.688625005     1.094783733     17.884470045 0 0 0
Zn      3.792417888     2.189559422     18.667069250 0 0 0
Zn      5.688625711     1.094783325     21.777838456
S       3.792418593     2.189559014     20.995239476
S       5.688625005     1.094783733     24.106008682
Zn      3.792417888     2.189559422     24.888607887
S       3.792418593     2.189559014     27.216778113
Zn      3.792421564     4.379113130     3.1132225450 0 0 0
S       1.896214446     5.473888819     2.3306235650 0 0 0
S       3.792420858     4.379113538     5.4413927710 0 0 0
Zn      1.896213741     5.473889227     6.2239919760 0 0 0
Zn      3.792421564     4.379113130     9.3347611820 0 0 0
S       1.896214446     5.473888819     8.5521622020 0 0 0
S       3.792420858     4.379113538     11.662931408 0 0 0
Zn      1.896213741     5.473889227     12.445530613 0 0 0
Zn      3.792421564     4.379113130     15.556299819 0 0 0
S       1.896214446     5.473888819     14.773700839 0 0 0
S       3.792420858     4.379113538     17.884470045 0 0 0
Zn      1.896213741     5.473889227     18.667069250 0 0 0
Zn      3.792421564     4.379113130     21.777838456
S       1.896214446     5.473888819     20.995239476
O       3.792420858     4.379113538     23.706008682
Zn      1.896213741     5.473889227     24.888607887
O       1.896214446     5.473888819     26.816778113
Zn      1.896217417     7.663442935     3.1132225450 0 0 0
S       0.000010299     8.758218624     2.3306235650 0 0 0
S       1.896216711     7.663443343     5.4413927710 0 0 0
Zn      0.000009594     8.758219032     6.2239919760 0 0 0
Zn      1.896217417     7.663442935     9.3347611820 0 0 0
S       0.000010299     8.758218624     8.5521622020 0 0 0
S       1.896216711     7.663443343     11.662931408 0 0 0
Zn      0.000009594     8.758219032     12.445530613 0 0 0
Zn      1.896217417     7.663442935     15.556299819 0 0 0
S       0.000010299     8.758218624     14.773700839 0 0 0
S       1.896216711     7.663443343     17.884470045 0 0 0
Zn      0.000009594     8.758219032     18.667069250 0 0 0
Zn      1.896217417     7.663442935     21.777838456
S       0.000010299     8.758218624     20.995239476
S       1.896216711     7.663443343     24.106008682
Zn      0.000009594     8.758219032     24.888607887
S       0.000010299     8.758218624     27.216778113
Zn      9.481041626     1.094787136     3.1132225450 0 0 0
S       7.584834508     2.189562825     2.3306235650 0 0 0
S       9.481040920     1.094787544     5.4413927710 0 0 0
Zn      7.584833803     2.189563233     6.2239919760 0 0 0
Zn      9.481041626     1.094787136     9.3347611820 0 0 0
S       7.584834508     2.189562825     8.5521622020 0 0 0
S       9.481040920     1.094787544     11.662931408 0 0 0
Zn      7.584833803     2.189563233     12.445530613 0 0 0
Zn      9.481041626     1.094787136     15.556299819 0 0 0
S       7.584834508     2.189562825     14.773700839 0 0 0
S       9.481040920     1.094787544     17.884470045 0 0 0
Zn      7.584833803     2.189563233     18.667069250 0 0 0
Zn      9.481041626     1.094787136     21.777838456
S       7.584834508     2.189562825     20.995239476
S       9.481040920     1.094787544     24.106008682
Zn      7.584833803     2.189563233     24.888607887
S       7.584834508     2.189562825     27.216778113
Zn      7.584837479     4.379116941     3.1132225450 0 0 0
S       5.688630361     5.473892630     2.3306235650 0 0 0
S       7.584836773     4.379117349     5.4413927710 0 0 0
Zn      5.688629656     5.473893038     6.2239919760 0 0 0
Zn      7.584837479     4.379116941     9.3347611820 0 0 0
S       5.688630361     5.473892630     8.5521622020 0 0 0
S       7.584836773     4.379117349     11.662931408 0 0 0
Zn      5.688629656     5.473893038     12.445530613 0 0 0
Zn      7.584837479     4.379116941     15.556299819 0 0 0
S       5.688630361     5.473892630     14.773700839 0 0 0
S       7.584836773     4.379117349     17.884470045 0 0 0
Zn      5.688629656     5.473893038     18.667069250 0 0 0
Zn      7.584837479     4.379116941     21.777838456
S       5.688630361     5.473892630     20.995239476
S       7.584836773     4.379117349     24.106008682
Zn      5.688629656     5.473893038     24.888607887
S       5.688630361     5.473892630     27.216778113
Zn      5.688633332     7.663446746     3.1132225450 0 0 0
S       3.792426214     8.758222435     2.3306235650 0 0 0
S       5.688632626     7.663447154     5.4413927710 0 0 0
Zn      3.792425509     8.758222843     6.2239919760 0 0 0
Zn      5.688633332     7.663446746     9.3347611820 0 0 0
S       3.792426214     8.758222435     8.5521622020 0 0 0
S       5.688632626     7.663447154     11.662931408 0 0 0
Zn      3.792425509     8.758222843     12.445530613 0 0 0
Zn      5.688633332     7.663446746     15.556299819 0 0 0
S       3.792426214     8.758222435     14.773700839 0 0 0
S       5.688632626     7.663447154     17.884470045 0 0 0
Zn      3.792425509     8.758222843     18.667069250 0 0 0
Zn      5.688633332     7.663446746     21.777838456
S       3.792426214     8.758222435     20.995239476
S       5.688632626     7.663447154     24.106008682
Zn      3.792425509     8.758222843     24.888607887
S       3.792426214     8.758222435     27.216778113
K_POINTS automatic
 3 3 1 0 0 0


-- 
***************************************
Amin Torabi
Ph.D. Student
Chemistry Dept.
Western University
London, On Canada, N6A 5B7
Phone: 519-661-2111 Ext: 87871
****************************************
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