Modulation of Conductivity by Surface Charges in Metals

Abstract

Experiments on conductivity modulation by surface charges in metals are reported. Because of the high density of carriers, it is necessary to work on thin films in order to get measurable effects. The experimental technique used and the results obtained are reported. Metals belonging to widely different groups (Au, Bi, Sb) have been tested, and peculiar features have been found. A tentative interpretation of these results is offered, and the nature of the information that could eventually be gained is pointed out.