EXCITED ACCEPTOR STATES IN II-VI SEMICONDUCTORS AND III-V SEMICONDUCTORS

Higher excited states of acceptors in CdTe, ZnTe, and GaAs are obtained by using the Baldereschi and Lipari spherical model including the cubic correction and the central‐cell effect. This is done by solving the coupled radial equations by the finite‐element method with Arnoldi's algorithm, which gives several (≈ 20) low‐lying states simultaneously. The procedure permits to determine very accurately the host band‐structure parameters. In the case of II–VI compounds, the Luttinger parameters γ1 = 5.30, γ2 = 1.62, γ3 = 2.10 and the dielectric constant ϵ0 = 9.3 for CdTe and, γ1 = 3.80, γ2 = 0.86, γ3 = 1.32 and ϵ0 = 9.4 for ZnTe are obtained. For GaAs, γ1 = 7.20, γ2 = 2.15, γ3 = 3.05, and ϵ0 = 12.49 are obtained. Copyright © 1990 WILEY‐VCH Verlag GmbH & Co. KGaA