[QE-users] Graphene component is missing in band structure calculations of BN-graphene bilayer

jibiaoli jibiaoli at foxmail.com
Fri Nov 2 14:02:06 CET 2018


Dear QE community,


I try to perform band structure calculations of a BN-graphene bilayer using the input files below. However,the calculations seem ignoring the graphene part and only gives the band structure of BN (bands.dat.gnu). Could you tell me what's wrong with my calculations?


I look forward to receiving your answers.


Best


Jibiao Li
Yangtze Normal University, Chongqing,China




bilayer.pw.inp:
 &CONTROL
                 calculation = 'relax' ,
                restart_mode = 'from_scratch' ,
                      outdir = './' ,
                  pseudo_dir = '/home/jibiaoli/pseudo/' ,
                      prefix = 'bilayer' ,
                     disk_io = 'high' ,
 /
 &SYSTEM
                       ibrav = 0,
                   celldm(1) = 8.16362,
                         nat = 8,
                        ntyp = 3,
                     ecutwfc = 31 ,
                     ecutrho = 180 ,
                 occupations = 'smearing' ,
                     degauss = 0.05D0 ,
                    smearing = 'methfessel-paxton' ,
                    vdw_corr = 'grimme-d2' ,
 /
 &ELECTRONS
                 mixing_beta = 0.2D0 ,
             diagonalization = 'david' ,
 /
 &IONS
 /
CELL_PARAMETERS alat 
     1.000000000    0.000000000    0.000000000 
     0.000000000    0.577250000    0.000000000 
     0.000000000    0.000000000    4.511710000 
ATOMIC_SPECIES
    C   12.00100  C.pbe-van_ak.UPF 
    B   10.81000  B.pbe-n-van.UPF 
    N   14.00700  N.pbe-van_ak.UPF 
ATOMIC_POSITIONS angstrom 
N        2.879765465   0.001562883   3.112022016
B        2.159469680   1.248548313   3.111925583
N        0.719662582   1.247230054   3.111926064
B        0.000000000   0.000000000   3.112809150    0   0   1
C        3.603851242   1.246706724   0.000000000    1   1   0
C        2.159647441   1.246187123   0.000000000    1   1   0
C        1.443875575  -0.000685925   0.000000000    1   1   0
C        0.000000000   0.000000000   0.000000000    0   0   0
K_POINTS automatic 
  3 6 1   0 0 0 


band.pw.inp:
 &CONTROL
                 calculation = 'bands' ,
                      outdir = './' ,
                  pseudo_dir = '/home/jibiaoli/pseudo/' ,
                      prefix = 'bilayer' ,
 /
 &SYSTEM
                       ibrav = 0,
                   celldm(1) = 8.16362,
                         nat = 8,
                        ntyp = 3,
                     ecutwfc = 31 ,
                     ecutrho = 180 ,
                 occupations = 'smearing' ,
                     degauss = 0.05D0 ,
                    smearing = 'methfessel-paxton' ,
                    vdw_corr = 'grimme-d2' ,
 /
 &ELECTRONS
                 mixing_beta = 0.2D0 ,
 /
CELL_PARAMETERS alat 
     1.000000000    0.000000000    0.000000000 
     0.000000000    0.577250000    0.000000000 
     0.000000000    0.000000000    4.511710000 
ATOMIC_SPECIES
    C   12.00100  C.pbe-van_ak.UPF 
    B   10.81000  B.pbe-n-van.UPF 
    N   14.00700  N.pbe-van_ak.UPF 
ATOMIC_POSITIONS angstrom 
N        2.879765465   0.001562883   3.112022016
B        2.159469680   1.248548313   3.111925583
N        0.719662582   1.247230054   3.111926064
B        0.000000000   0.000000000   3.112809150    0   0   1
C        3.603851242   1.246706724   0.000000000    1   1   0
C        2.159647441   1.246187123   0.000000000    1   1   0
C        1.443875575  -0.000685925   0.000000000    1   1   0
C        0.000000000   0.000000000   0.000000000    0   0   0
 K_POINTS crystal
          56
        0.0000000000    0.0000000000    0.0000000000    1.0
        0.0454545455    0.0000000000    0.0000000000    1.0
        0.0909090909    0.0000000000    0.0000000000    1.0
        0.1363636364    0.0000000000    0.0000000000    1.0
        0.1818181818    0.0000000000    0.0000000000    1.0
        0.2272727273    0.0000000000    0.0000000000    1.0
        0.2727272727    0.0000000000    0.0000000000    1.0
        0.3181818182    0.0000000000    0.0000000000    1.0
        0.3636363636    0.0000000000    0.0000000000    1.0
        0.4090909091    0.0000000000    0.0000000000    1.0
        0.4545454545    0.0000000000    0.0000000000    1.0
        0.5000000000    0.0000000000    0.0000000000    1.0
        0.5000000000    0.0263157895    0.0000000000    1.0
        0.5000000000    0.0526315789    0.0000000000    1.0
        0.5000000000    0.0789473684    0.0000000000    1.0
        0.5000000000    0.1052631579    0.0000000000    1.0
        0.5000000000    0.1315789474    0.0000000000    1.0
        0.5000000000    0.1578947368    0.0000000000    1.0
        0.5000000000    0.1842105263    0.0000000000    1.0
        0.5000000000    0.2105263158    0.0000000000    1.0
        0.5000000000    0.2368421053    0.0000000000    1.0
        0.5000000000    0.2631578947    0.0000000000    1.0
        0.5000000000    0.2894736842    0.0000000000    1.0
        0.5000000000    0.3157894737    0.0000000000    1.0
        0.5000000000    0.3421052632    0.0000000000    1.0
        0.5000000000    0.3684210526    0.0000000000    1.0
        0.5000000000    0.3947368421    0.0000000000    1.0
        0.5000000000    0.4210526316    0.0000000000    1.0
        0.5000000000    0.4473684211    0.0000000000    1.0
        0.5000000000    0.4736842105    0.0000000000    1.0
        0.5000000000    0.5000000000    0.0000000000    1.0
        0.4772727273    0.4772727273    0.0000000000    1.0
        0.4545454545    0.4545454545    0.0000000000    1.0
        0.4318181818    0.4318181818    0.0000000000    1.0
        0.4090909091    0.4090909091    0.0000000000    1.0
        0.3863636364    0.3863636364    0.0000000000    1.0
        0.3636363636    0.3636363636    0.0000000000    1.0
        0.3409090909    0.3409090909    0.0000000000    1.0
        0.3181818182    0.3181818182    0.0000000000    1.0
        0.2954545455    0.2954545455    0.0000000000    1.0
        0.2727272727    0.2727272727    0.0000000000    1.0
        0.2500000000    0.2500000000    0.0000000000    1.0
        0.2272727273    0.2272727273    0.0000000000    1.0
        0.2045454545    0.2045454545    0.0000000000    1.0
        0.1818181818    0.1818181818    0.0000000000    1.0
        0.1590909091    0.1590909091    0.0000000000    1.0
        0.1363636364    0.1363636364    0.0000000000    1.0
        0.1136363636    0.1136363636    0.0000000000    1.0
        0.0909090909    0.0909090909    0.0000000000    1.0
        0.0681818182    0.0681818182    0.0000000000    1.0
        0.0454545455    0.0454545455    0.0000000000    1.0
        0.0227272727    0.0227272727    0.0000000000    1.0
        0.0000000000    0.0000000000    0.0000000000    1.0
        0.0000000000    0.0000000000    0.1666666667    1.0
        0.0000000000    0.0000000000    0.3333333333    1.0
        0.0000000000    0.0000000000    0.5000000000    1.0


bands.inp:
 &BANDS
    prefix  = 'bilayer'
    outdir = './'
    filband = 'bands.dat'
 /
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