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Spin-orbit coupling parameters and electron g factor of II-VI zinc-blende materials

1995; American Physical Society; Volume: 51; Issue: 24 Linguagem: Inglês

10.1103/physrevb.51.17992

1095-3795

Morten Willatzen, M. Cardona, N. E. Christensen,

Magnetic and transport properties of perovskites and related materials

We perform tight-binding estimates and linear muffin-tin-orbital calculations of the ${\mathrm{\ensuremath{\Delta}}}_{0}$, ${\mathrm{\ensuremath{\Delta}}}_{0}^{\ensuremath{'}}$, and ${\mathrm{\ensuremath{\Delta}}}^{\mathrm{\ensuremath{-}}}$ spin-orbit coupling parameters of II-VI zinc-blende materials. Good agreement is found in the case of ZnTe with recent experimental results by Drechsler et al. [Phys. Rev. B 50, 2649 (1994)]. The contribution from the ${\mathrm{\ensuremath{\Delta}}}^{\mathrm{\ensuremath{-}}}$ parameter to the electron g factor of II-VI materials is calculated and found to be larger than the ``conventional'' g factor (without the ${\mathrm{\ensuremath{\Delta}}}^{\mathrm{\ensuremath{-}}}$ contribution) in the case of ZnTe, but smaller for the other II-VI compounds. From the momentum matrix elements used in the calculations, realistic values of the Luttinger parameters are estimated.