Copper on Ni(111): the electron states from submonolayer to several monolayer coverages

Experimental and theoretical results are presented for Cu on an Ni(111) surface. The monolayer case is discussed in detail in connection with theoretical results of a tight-binding calculation. The theory accounts for the Cu 3d-peak position and the modification of the substrate density of states. Also, the measured Cu 3d line shape can be understood on the basis of the theory.