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研究了电场调控型自旋场效应管的量子输运过程。该场效应管主要由双正交电场和Rashba自旋轨道耦合共同调制。运用散射矩阵方法并结合介观体系的相关输运理论,揭示了自旋场效应管在各参数调控下的自旋量子输运过程,其自旋输运规律可由相关理论给予解释。数值计算表明,与平行电场相比,对于自旋轨道耦合型自旋场效应管的量子输运,垂直电场的调制能够导致更加明显的自旋翻转。
The quantum transport process of a field-controlled spin-FET is studied. The FET is mainly co-modulated by a bi-orthogonal electric field and a Rashba spin-orbit coupling. By using the scattering matrix method and the related transport theory of mesoscopic system, the spin quantum transport process of spin field effect transistor under various parameters is revealed. The law of spin transport can be explained by related theories. Numerical calculations show that the modulation of the vertical electric field can lead to a more pronounced spin inversion of the spin-orbit-coupled spin field effect transistor compared to the parallel electric field.