Thermal-energy atom-scattering study of Pb submonolayers on Cu(110)

Submonolayers of Pb deposited at room temperature on a Cu(110) substrate undergo, with increasing Pb coverage, a continuous transition [lattice gas{→}c(2×{}2) structure], followed by a first-order transition [c(2×{}2){→}p(4×{}1)]. The further transformation of the p(4×{}1) layer into a quasicompact hexagonal layer with p(5×{}1) structure occurs by elimination of domain walls, probably with intermediate formation of a p(9×{}1) structure.