[Pw_forum] carbon nanotube & copper chain

chengyu yang chengyu.young at gmail.com
Fri Jun 18 02:42:02 CEST 2010


Dear everyone,
      i am trying to creat a carbon nanotube with a cu chain in its center,
but i am not sure if my parameter settings are correct:I don't know if under
the &system item, i should use the only cnt's data, and i am not sure the
setting of k points. Because it will cost a lot of time to calculate, I want
to make it as correct as possible. Would you plz have a look at my script
and give some suggestions?Thank you.
     As following:

&CONTROL
                 calculation = 'scf' ,
                restart_mode = 'from_scratch' ,
                      outdir = '/home/mems/espresso-4.2/tmp/' ,
                  pseudo_dir = '/home/mems/espresso-4.2/pseudo/' ,
                      prefix = 'cnt' ,
 /
 &SYSTEM
                       ibrav = 6,
                   celldm(1) = 108.82270564,celldm(3)=0.213765379
                         nat = 125,
                        ntyp = 2,
                     ecutwfc = 75 ,
 /
 &ELECTRONS
                    conv_thr = 1.0d-8 ,
                   mixing_beta = 0.7 ,
 /
ATOMIC_SPECIES
    C   12.01100  C.pz-vbc.UPF
    Cu  63.55     Cu.pz-d-rrkjus.UPF
ATOMIC_POSITIONS angstrom
  C        4.085165    -0.000000    -6.155049
  C        3.838021     1.399343    -6.155049
  C        3.537856     2.042582    -4.924040
  C        2.624152     3.130877    -4.924040
  C        2.042582     3.537856    -6.155049
  C        0.707144     4.023496    -6.155049
  C        0.000000     4.085165    -4.924040
  C       -1.399343     3.838021    -4.924040
  C       -2.042582     3.537856    -6.155049
  C       -3.130877     2.624152    -6.155049
  C       -3.537856     2.042582    -4.924040
  C       -4.023496     0.707144    -4.924040
  C       -4.085165     0.000000    -6.155049
  C       -3.838021    -1.399343    -6.155049
  C       -3.537856    -2.042582    -4.924040
  C       -2.624152    -3.130877    -4.924040
  C       -2.042582    -3.537856    -6.155049
  C       -0.707144    -4.023496    -6.155049
  C       -0.000000    -4.085165    -4.924040
  C        1.399343    -3.838021    -4.924040
  C        2.042582    -3.537856    -6.155049
  C        3.130877    -2.624152    -6.155049
  C        3.537856    -2.042582    -4.924040
  C        4.023496    -0.707144    -4.924040
  C        4.085165    -0.000000    -3.693030
  C        3.838021     1.399343    -3.693030
  C        3.537856     2.042582    -2.462020
  C        2.624152     3.130877    -2.462020
  C        2.042582     3.537856    -3.693030
  C        0.707144     4.023496    -3.693030
  C        0.000000     4.085165    -2.462020
  C       -1.399343     3.838021    -2.462020
  C       -2.042582     3.537856    -3.693030
  C       -3.130877     2.624152    -3.693030
  C       -3.537856     2.042582    -2.462020
  C       -4.023496     0.707144    -2.462020
  C       -4.085165     0.000000    -3.693030
  C       -3.838021    -1.399343    -3.693030
  C       -3.537856    -2.042582    -2.462020
  C       -2.624152    -3.130877    -2.462020
  C       -2.042582    -3.537856    -3.693030
  C       -0.707144    -4.023496    -3.693030
  C       -0.000000    -4.085165    -2.462020
  C        1.399343    -3.838021    -2.462020
  C        2.042582    -3.537856    -3.693030
  C        3.130877    -2.624152    -3.693030
  C        3.537856    -2.042582    -2.462020
  C        4.023496    -0.707144    -2.462020
  C        4.085165    -0.000000    -1.231010
  C        3.838021     1.399343    -1.231010
  C        3.537856     2.042582     0.000000
  C        2.624152     3.130877     0.000000
  C        2.042582     3.537856    -1.231010
  C        0.707144     4.023496    -1.231010
  C        0.000000     4.085165     0.000000
  C       -1.399343     3.838021     0.000000
  C       -2.042582     3.537856    -1.231010
  C       -3.130877     2.624152    -1.231010
  C       -3.537856     2.042582     0.000000
  C       -4.023496     0.707144     0.000000
  C       -4.085165     0.000000    -1.231010
  C       -3.838021    -1.399343    -1.231010
  C       -3.537856    -2.042582     0.000000
  C       -2.624152    -3.130877     0.000000
  C       -2.042582    -3.537856    -1.231010
  C       -0.707144    -4.023496    -1.231010
  C       -0.000000    -4.085165     0.000000
  C        1.399343    -3.838021     0.000000
  C        2.042582    -3.537856    -1.231010
  C        3.130877    -2.624152    -1.231010
  C        3.537856    -2.042582     0.000000
  C        4.023496    -0.707144     0.000000
  C        4.085165    -0.000000     1.231010
  C        3.838021     1.399343     1.231010
  C        3.537856     2.042582     2.462020
  C        2.624152     3.130877     2.462020
  C        2.042582     3.537856     1.231010
  C        0.707144     4.023496     1.231010
  C        0.000000     4.085165     2.462020
  C       -1.399343     3.838021     2.462020
  C       -2.042582     3.537856     1.231010
  C       -3.130877     2.624152     1.231010
  C       -3.537856     2.042582     2.462020
  C       -4.023496     0.707144     2.462020
  C       -4.085165     0.000000     1.231010
  C       -3.838021    -1.399343     1.231010
  C       -3.537856    -2.042582     2.462020
  C       -2.624152    -3.130877     2.462020
  C       -2.042582    -3.537856     1.231010
  C       -0.707144    -4.023496     1.231010
  C       -0.000000    -4.085165     2.462020
  C        1.399343    -3.838021     2.462020
  C        2.042582    -3.537856     1.231010
  C        3.130877    -2.624152     1.231010
  C        3.537856    -2.042582     2.462020
  C        4.023496    -0.707144     2.462020
  C        4.085165    -0.000000     3.693030
  C        3.838021     1.399343     3.693030
  C        3.537856     2.042582     4.924040
  C        2.624152     3.130877     4.924040
  C        2.042582     3.537856     3.693030
  C        0.707144     4.023496     3.693030
  C        0.000000     4.085165     4.924040
  C       -1.399343     3.838021     4.924040
  C       -2.042582     3.537856     3.693030
  C       -3.130877     2.624152     3.693030
  C       -3.537856     2.042582     4.924040
  C       -4.023496     0.707144     4.924040
  C       -4.085165     0.000000     3.693030
  C       -3.838021    -1.399343     3.693030
  C       -3.537856    -2.042582     4.924040
  C       -2.624152    -3.130877     4.924040
  C       -2.042582    -3.537856     3.693030
  C       -0.707144    -4.023496     3.693030
  C       -0.000000    -4.085165     4.924040
  C        1.399343    -3.838021     4.924040
  C        2.042582    -3.537856     3.693030
  C        3.130877    -2.624152     3.693030
  C        3.537856    -2.042582     4.924040
  C        4.023496    -0.707144     4.924040
  Cu       0            0           -6.184547225
  Cu       0            0           -3.710728335
  Cu       0            0           -1.236909445
  Cu       0            0            1.236909445
  Cu       0            0            3.710728335

K_POINTS automatic
  4 4 4   1 1 1
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