 &control
    calculation = 'scf'
 /
 &system
    ibrav=  2, 
    celldm(1) =26.0, 
    nat=  1, ntyp= 1, 
    ecutwfc=25
    nbnd=9
    occupations='from_input'
 /
 &electrons
    conv_thr =  1.0d-6
    tqr=.true.
    diago_david_ndim=4
 /
ATOMIC_SPECIES
 Cu   1.000  Cu.pbe-kjpaw.UPF 
ATOMIC_POSITIONS {alat}
Cu  0.0   0.0   0.0
K_POINTS {gamma}
OCCUPATIONS
 2.0 2.0 2.0 2.0 2.0   1.0   0.0 0.0 0.0
