Theory for the cyclotron resonance of holes in strained asymmetric Ge-SiGe quantum wells

R. Winkler, M. Merkler, T. Darnhofer, and U. Rössler
Phys. Rev. B 53, 10858 – Published 15 April 1996
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Abstract

We present calculations of hole Landau levels, cyclotron masses, and far-infrared spectra for strained asymmetric p-type Ge-SixGe1x quantum wells in a perpendicular magnetic field in order to interpret recent experimental results by Engelhardt et al. [Solid State Electron. 37, 949 (1994)]. Self-consistent hole subband calculations are combined with calculations of the Landau levels using a 6×6 kp Hamiltonian for the topmost Γ8 and Γ7 bulk valence bands. Our results are in very good agreement with the experimental data. Taking into account the coupling to the split-off band turns out to be important. The complex spectra of hole Landau levels in strained quantum wells remind one of the well known quantum resonance spectra of bulk p-type Ge under uniaxial stress. © 1996 The American Physical Society.

  • Received 13 July 1995

DOI:https://doi.org/10.1103/PhysRevB.53.10858

©1996 American Physical Society

Authors & Affiliations

R. Winkler, M. Merkler, T. Darnhofer, and U. Rössler

  • Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany

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Vol. 53, Iss. 16 — 15 April 1996

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