Abstract
Spin transport phenomena in solid materials suffer limitations from spin relaxation associated to disorder or lack of translational invariance. Ultracold atoms, free of that disorder, can provide a platform to observe phenomena beyond the usual two-dimensional electron gas. By generalizing the approach used for isotropic two-dimensional electron gases, we theoretically investigate the inverse spin galvanic effect in the two-level atomic system in the presence of anisotropic Rashba-Dresselhaus spin-orbit couplings (SOC) and external magnetic field. We show that the combination of the SOC results in an asymmetric case: the total spin polarization considered for a small momentum has a longer spin state than in a two-dimensional electron gas when the SOC field prevails over the external electric field. Our results can be relevant for advancing experimental and theoretical investigations in spin dynamics as a basic approach for studying spin state control.
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Miatka, I., Barbieri, M. & Raimondi, R. Nonlinear inverse spin galvanic effect in anisotropic disorder-free systems. Eur. Phys. J. D 73, 107 (2019). https://doi.org/10.1140/epjd/e2019-90667-1
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DOI: https://doi.org/10.1140/epjd/e2019-90667-1