Magneto-optical absorption spectrum of a D ion in a GaAs-Ga0.75Al0.25As quantum well

M. Fujito, A. Natori, and H. Yasunaga
Phys. Rev. B 51, 4637 – Published 15 February 1995
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Abstract

The magneto-optical absorption spectrum of a D ion in a GaAs-Ga0.75Al0.25As quantum well is calculated. We used the variational method based on a two-orbital picture of a D ion, in which each wave function is represented by a linear combination of anisotropic Gaussian orbitals. The calculated magnetic-field dependence of the binding energy of a D ion agrees qualitatively with the experimental result. In a magnetic field perpendicular to the well interface, the energies of the one-electron excited states of a D ion are completely quantized, and broadening is essential for the calculation of the line shape of the magneto-optical absorption spectrum. We considered two types of broadening effect, lifetime broadening and inhomogeneous broadening. Only the lifetime broadening effect reproduces fairly well the observed line shape of the magneto-photoconductivity spectrum. The assumed value of the lifetime is consistent with the measured Hall mobility.

  • Received 5 October 1994

DOI:https://doi.org/10.1103/PhysRevB.51.4637

©1995 American Physical Society

Authors & Affiliations

M. Fujito, A. Natori, and H. Yasunaga

  • The University of Electro-Communications, Chofu, Tokyo 182, Japan

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Vol. 51, Iss. 7 — 15 February 1995

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