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Band structure and magnetotransport of a two-dimensional electron gas in the presence of spin-orbit interaction

X. F. Wang·P. Vasilopoulos
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Abstract

The band structure and magnetotransport of a two-dimensional electron gas (2DEG), in the presence of the Rashba (RSOI) and Dresselhaus (DSOI) terms of the spin-orbit interaction and of a perpendicular magnetic field, is investigated. Exact and approximate analytical expressions for the band structure are obtained and used to calculate the density of states (DOS) and the longitudinal magnetoresitivity assuming a Gaussian type of level broadening. The interplay between the Zeeman coupling and the two terms of the SOI is discussed. If the strengths $α$ and $ β$, of the RSOI and DSOI, respectively, are equal and the $g$ factor vanishes, the two spin states are degenerate and a shifted Landau-level structure appears. With the increase of the difference $α- β$, a novel beating pattern of the DOS and of the Shubnikov-de Haas (SdH) oscillations appears distinctly different from that occurring when one of these strengths vanishes.

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X. F. Wang, P. Vasilopoulos. 2005-01-10. Band structure and magnetotransport of a two-dimensional electron gas in the presence of spin-orbit interaction. https://doi.org/10.1103/physrevb.72.085344

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