论文标题
自旋轨道相互作用对圆电流的影响：环导体内的纯自旋电流现象
Effect of spin-orbit interaction on circular current: Pure spin current phenomena within a ring conductor
论文作者
论文摘要
净循环电流可能会出现在有限偏置下的量子环内。我们在存在Rashba自旋轨道相互作用（RSOI）的情况下研究圆电流的特征。电荷和自旋电流都出现在环内。当环对称连接到外部导线时，我们可以在非零的Fermi能量下获得纯电荷电流。另一方面，对于不对称的环对铅构型，在零fermi能量下，自旋电流消失，但纯电荷电流在环内流动。调整RSOI，我们展示了一种在外部控制纯旋转电流的方法。纯自旋圆电流的产生的新观点可以为高效，低能成本的自旋设备开辟新的基础。
A net circulating current may appear within a quantum ring under finite bias. We study the characteristic features of the circular current in the presence of Rashba spin-orbit interaction (RSOI). Both charge and spin currents appear within the ring. Whereas when the ring is symmetrically connected to the external leads, we can get a pure charge current at non-zero Fermi-energy. On the other hand, for asymmetric ring-to-leads configuration, at zero Fermi-energy, the spin current vanishes but a pure charge current flows within the ring. Tuning RSOI, we demonstrate a way to control the pure spin current externally. This new perspective of the generation of the pure spin circular current can open a new basis for the highly efficient, low energy cost spintronic devices.
