A. Nagarajan, S. Mukherjee, et al.
Journal of Applied Mechanics, Transactions ASME
The first theoretical and experimental analysis of image states at a semiconductor surface is presented: results of angle resolved inverse photoemission and of ab-initio pseudopotential calculation in the non-local density approximation for GaP(1 1 0) are compared showing the presence of a well defined image state with a dispersion in k-space very different from the one predicted by simple models. © 1990.