Two types of sulfur-induced (2×1) reconstructions on InP(0 0 1)

A novel method of surface sulfurization based on in situ PbS deposition at elevated substrate temperatures followed by successive annealing has been used for investigation of sulfur-induced surface reconstructions on InP(0 0 1)-(2×4). Two different (2×1) reconstructions have been observed by low-energy electron diffraction at 200–410°C and 420–445°C, respectively, separated from each other by a (1×1) pattern in the range of 410–420°C. A consistent examination of the results provided by electron diffraction and photoemission techniques has allowed us to propose models of atomic arrangement for both observed (2×1) structures.