Suppression of spin beats in magneto-oscillation phenomena in two-dimensional electron gas
arXiv:cond-mat/0412021 · doi:10.1016/j.ssc.2004.12.005
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.
5 pages, 3 figures
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- Giant Zeeman splitting of light holes in GaAs/AlGaAs quantum wells
- Spin Hall effect in a two-dimensional electron gas in the presence of a magnetic field
- Beatings of ratchet current magneto-oscillations in GaN-based grating gate structures: manifestation of spin-orbit band splitting
- Enhanced circular photogalvanic effect in HgTe quantum wells in the heavily inverted regime
- Manifestation of spin-orbit interaction in tunneling between 2D electron layers
- Quantum oscillations in 2D electron gases with spin-orbit and Zeeman interactions
- Quenching of the DOS beats in a two-dimensional electron gas in tilted magnetic fields
- Efficient method to calculate energy spectra for analysing magneto-oscillations