quantum-espresso/tests/vdw.in

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&control
calculation='scf'
/
&system
ibrav=4
celldm(1)=4.66
celldm(3)=2.60
nat=4
ecutwfc=18.
ecutrho=200.
ntyp=1
occupations='smearing'
degauss=0.02
smearing='marzari-vanderbilt'
london=.true.
london_rcut = 150
london_s6 = 0.75
/
&electrons
mixing_beta=0.5
mixing_ndim=20
/
ATOMIC_SPECIES
C 12. C.pbe-van_bm.UPF 1
K_POINTS {gamma}
ATOMIC_POSITIONS {crystal}
C 0.00000 1.00000 0.75000
C 0.66667 0.33333 0.75000
C 0.00000 1.00000 0.25000
C 0.33333 0.66667 0.25000