Density of Energy Spectrum of an Electron in the Image-Potential Field and a Trapping Electric Field

Abstract

The motion of an electron in an image field and a blocking electric field is considered in semiclassical approximation. An exact analytical expression is found for the density of the energy spectrum of states. The dependence of spectral density on energy is obtained in a wide range of electric field strengths. The energy ranges with a qualitatively different structure of the spectrum are determined.