The electronic band structures of superlattices consisting of alternating (111) slabs of Ag and Au were investigated with use of angle-resolved photoemission. The fundamental electronic effects of a superlattice potential, including band folding and the formation of energy gaps at the new zone boundaries, were clearly observed.

• Received 6 February 1989

DOI:https://doi.org/10.1103/PhysRevB.40.1301