Using a streamlined computation scheme, an efficient calculation of th
e electronic structure of Cu(001) is achieved. The method employs the
tight-binding linear muffin-tin orbitals and takes advantage of a matr
ix operation that greatly reduces the computation time. Coupled with a
scaling self-consistent procedure, reasonable results including layer
-resolved local density of states, dipole moment, and work function ar
e obtained. The results also strongly suggest that one empty overlayer
is enough for surface calculation and that at least six more layers b
elow the intended surface layer are needed in order to have a converge
nt local density of states.