[Pw_forum] Copper pseudopotential

[Nay Lin]

Dear all

I am testing Cu.pbe-d-rrkjus.UPF for equilibrium lattice constant.

with the k grid of 30x30x30 0 0 0 (automatic), Ecut 30, rhocut 120,
occupation='smearing', smearing='mp', degauss=0.02

i am getting the lattice constant around 6.93 where experimental value is
6.82 bohr.

Is this accuracy enough for supercell copper surface calculations?

Please help
Thanks
Lin
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