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Suppression of spin beats in magneto-oscillation phenomena in two-dimensional electron gas

N. S. Averkiev·M. M. Glazov·S. A. Tarasenko
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Abstract

Theory of magneto-oscillation phenomena has been developed for two-dimensional electron systems with linear-in-k spin splitting. Both Dresselhaus and Rashba contributions are taken into account. It has been shown that the pattern of the magneto-oscillations depends drastically on the ratio between the above terms. The presence of only one type of the k-linear terms gives rise to the beats, i.e. two close harmonics corresponding to the spin-split subbands. However, if the strengths of both contributions are comparable, the third (central) harmonics appears in the spectrum of the magneto-oscillations. For equal strengths of the contributions, only the central harmonic survives, and the oscillations occur at a single frequency, although the k-linear terms remain in the Hamiltonian. Such suppression of the spin beats is studied in detail by the example of the Shubnikov-de Haas effect.

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N. S. Averkiev, M. M. Glazov, S. A. Tarasenko. 2004-12-01. Suppression of spin beats in magneto-oscillation phenomena in two-dimensional electron gas. https://doi.org/10.1016/j.ssc.2004.12.005

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