Approximate Treatment of Exciton Effects in Electric Field Modulation Via the Slater-Koster Interaction

J. E. Rowe; D. E. Aspnes

doi:10.1103/PhysRevLett.25.162

Approximate Treatment of Exciton Effects in Electric Field Modulation Via the Slater-Koster Interaction

J. E. Rowe and D. E. Aspnes

Phys. Rev. Lett. 25, 162 – Published 20 July 1970; Erratum Phys. Rev. Lett. 25, 979 (1970)

Abstract

Exciton effects on electric field modulation line shapes at general critical points are treated using a Slater-Koster contact interaction to approximate the Coulomb potential. This interaction produces a mixing of one-electron line shapes similar to that calculated for an unperturbed solid. By comparison with experiment, we show that exciton effects are present in the $E_{1}$ structure of low-temperature electroreflectance data of Ge.