POSCAR for slab defined by SURFACE card and Nslab and Vacuum_thickness_in_Angstrom in wt.in by WannierTools
1.0
    3.000000    0.000000    0.000000
    0.000000    3.000000    0.000000
    0.000000    0.000000   40.583544
X     Y     
    10    10
Cartesian
    0.000000    0.000000    6.641772        X
    0.000000    0.000000    9.641772        X
    0.000000    0.000000   12.641772        X
    0.000000    0.000000   15.641772        X
    0.000000    0.000000   18.641772        X
    0.000000    0.000000   21.641772        X
    0.000000    0.000000   24.641772        X
    0.000000    0.000000   27.641772        X
    0.000000    0.000000   30.641772        X
    0.000000    0.000000   33.641772        X
    1.500000    1.500000    8.141772        Y
    1.500000    1.500000   11.141772        Y
    1.500000    1.500000   14.141772        Y
    1.500000    1.500000   17.141772        Y
    1.500000    1.500000   20.141772        Y
    1.500000    1.500000   23.141772        Y
    1.500000    1.500000   26.141772        Y
    1.500000    1.500000   29.141772        Y
    1.500000    1.500000   32.141772        Y
    1.500000    1.500000   35.141772        Y
