| Abstract: | Available experimental data indicate that the Kane models for the band structure of diamond-like semiconductors do not sufficiently correctly describe the effects of the anisotropy and nonparabolicity of the valence bands. In 1], we carried out parallel examinations of the spectrum for all diamond-like semiconductors with a lower conduction band of the s-type within the four-band kp model, which is a generalization of both Kane models. We obtained a dispersion equation of fourth degree (DE-4s), allowing us to refine the range of applicability of the Kane models. This paper is a continuation of 1] in which we do a detailed analysis of the nonparabolicity and anisotropy of the dispersion relations for the holes. We show that neither of the Kane models correctly describe the state of the light-hole band over a broad energy range. At the same time, the heavy-hole band is correctly described by the Kane equation (1956); the conduction band and the split-off hole band are correctly described by the Kane theory (1957).Ukrainian Engineering Institute for Utilization and Control of Water. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 109–114, November, 1992. |
