Date of Original Version
Cesium adsorption on GaAs(110) has been studied by angle-resolved photoemission spectroscopy at room temperature in the submonolayer-coverage regime. We report the observation of a Cs-induced surface state in the vicinity of the surface-Brillouin-zone edge. The possible origin of the state is discussed in relation to recent structural observations. The onset of the Cs-induced surface state can be correlated with the appearance of a second Cs 5p core-level emission feature at ∼0.2 monolayer Cs coverage.
T. Maeda Wong, N. J. DiNardo, D. Heskett, and E. W. Plummer. (1990). "Cs-induced surface state on GaAs(110)." Physical Review B, 41(17), 12342(R). Available at: http://dx.doi.org/10.1103/PhysRevB.41.12342