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首页> 外文期刊>The European physical journal, B. Condensed matter physics >Charge Hall effect generated by spin-polarized current injected into Rashba spin orbit coupling media
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Charge Hall effect generated by spin-polarized current injected into Rashba spin orbit coupling media

机译：由注入Rashba自旋轨道耦合介质的自旋极化电流产生的电荷霍尔效应

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摘要

Using the Keldysh Green’s function method, we study theoretically the electron accumulation induced by the inverse spin Hall effect in a spin valve structure in which a clean quantum wire formed from a 2D electron gas (2DEG) with Rashba/Dresselahaus spin orbit interaction (SOI) is connected to two ferromagnet electrodes. In a nonequilibrium situation when a spin current with an out-of plane (the 2DEG plane) spin polarization is driven through the SOI region by an external voltage, non-equilibrium electron accumulation or a Hall voltage forms at the two lateral sides of the quantum wire and exhibits an oscillation along the wire like the Rashba spin precession; the magnetization directions of FMs affect the Hall voltage and their parallel or antiparallel alignment along the normal direction of the 2DEG plane is most favorable to the Hall voltage. In an equilibrium situation, two planar magnetizations which are not collinear can generate an electron accumulation/a Hall voltage too. When one of the FM electrodes is replaced by a normal metal (NM), the electron accumulation is still present along the wire and its magnitude remains nearly unchanged in the biased case, whereas in the unbiased case it is reduced significantly and even vanishes.
机译：使用Keldysh Green函数方法，我们理论上研究了自旋阀结构中由逆自旋霍尔效应引起的电子积累，该自旋阀结构由具有Rashba / Dresselahaus自旋轨道相互作用（SOI）的2D电子气（2DEG）形成的干净量子线连接到两个铁磁体电极。在非平衡情况下，当外部电压驱动具有平面外（2DEG平面）的自旋极化的自旋电流通过SOI区时，在量子的两个侧面形成非平衡电子累积或霍尔电压导线并像Rashba自旋进动一样沿导线产生振荡; FM的磁化方向会影响霍尔电压，并且它们沿2DEG平面法线方向的平行或反平行排列最有利于霍尔电压。在平衡状态下，两个非共线的平面磁化强度也会产生电子累积/霍尔电压。当将FM电极之一替换为普通金属（NM）时，在导线上仍然存在电子累积，并且在偏置情况下其大小几乎保持不变，而在无偏置情况下，其显着减少甚至消失。

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