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Nonlinear inverse spin galvanic effect in anisotropic disorder-free systems

机译:非线性逆旋转电流效应在各向异性紊乱的系统中

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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.
机译:固体材料中的旋转运输现象来自旋转松弛的局限性与紊乱或缺乏平移的不变性。 Ulthacold原子,没有这种疾病,可以提供一个平台,以观察超出通常的二维电子气体的现象。 通过推广用于各向同性二维电子气体的方法,理论上在各向异性Rashba-Tresselhaus旋转轨道耦合(SOC)和外部磁场存在下,从理论上研究了两级原子系统中的逆旋转电流效应。 我们表明SOC的组合导致非对称情况:当SOC场在外部电场上占该SOC场时,所考虑的小动量的总自旋极化具有比二维电子气体更长的旋转状态。 我们的结果与推进旋转动力学的实验和理论调查有关,作为研究旋转状态控制的基本方法。

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