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ndtset   8
getwfk -1

#Definition of the unit cell
acell1   3*0.938
acell2   3*0.954
acell3   3*0.960
acell4   3*0.968
acell5   3*0.974
acell6   3*0.981
acell7   3*0.987
acell8   3*0.993 

    rprim       8.507000000       0.000000000       0.000000000    
                0.000000000       8.507000000       0.000000000    
                0.000000000       0.000000000       8.507000000

#Definition of the atom types
   ntypat  2         # There are two types of atom
   znucl   26 14     # The keyword "znucl" refers to the atomic number of the 
                      # possible type(s) of atom. The pseudopotential(s) 
                      # mentioned in the "files" file must correspond
                      # to the type(s) of atom. 

#Definition of the atoms
    natom   8         # There are eight atoms
    typat   1 1 1 1 2 2 2 2
                       
     xred   0.00000000    0.00000000    0.00000000
            0.23200000    0.73200000    0.50000000
            0.50000000    0.23200000    0.73200000
            0.73200000    0.50000000    0.23200000
            0.71050000    0.71050000    0.71050000
            0.52150000    0.02150000    0.21050000
            0.21050000    0.52150000    0.02150000
            0.02150000    0.21050000    0.52150000

#Definition of the planewave basis set
ecut  10.0         # Maximal kinetic energy cut-off, in Hartree

#Exchange-correlation functional
ixc 1             # LDA Teter Pade parametrization

#Definition of the k-point grid
kptopt 1          # Option for the automatic generation of k points, taking
                  # into account the symmetry
ngkpt 8 8 8       # This is a 8x8x8 FCC grid, based on the primitive vectors

toldfe 1.0d-8     # Will stop when, twice in a row, the difference
                  # between two consecutive evaluations of total energy
                  # differ by less than toldfe (in Hartree)
                  # This value is way too large for most realistic studies of materials
diemac 10