Surface reconstructions of oxygen deficient SnO2(110)

Abstract The reconstruction of an ion-bombarded SnO 2 (110) surface has been studied with LEED, AES, XPS and UPS. In general, reconstructions of the ion-bombarded surface are associated with an extreme surface oxygen deficiency. Emission is observed throughout the band gap up to the Fermi level with UPS, and is associated with the presence of three-fold and four-fold coordinated Sn cations. Structural models have been proposed for the c(2 × 2) and (4 × 1) reconstructions based on disorder due to oxygen vacancies with a tendency toward alternation, and the formation of a SnO(101) overlayer, respectively.