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arXiv 1503.04274cond-mat.mes-hall
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自旋-轨道耦合介观环中的轨道磁相和纯持续自旋流

Orbital magnetic phase and pure persistent spin current in spin-orbit coupling mesoscopic rings

Guang-Yao Huang, Shi-Dong Liang

摘要:

通过求解介观环的Rashba模型,解析地给出了介观环的基态性质,包括自旋极化、持续电荷和自旋电流(PCC和PSC)。这些基态性质可以根据环中的四种电子数给出。环的自感效应导致自持磁通量(SSMF)和自持PCC、PSC,它们自发地打破时间反演对称性,形成轨道磁相位(OMP)。通过调节环的自旋轨道耦合强度或电子数可以诱导OMP与非OMP之间的相变。对于正合一维环,我们发现纯PSC和SSMF共存。纯PSC的这一特性为测量纯PSC提供了一种新的方案。

英文摘要:

By solving the Rashba model of mesoscopic rings, we give analytically the ground-state properties of the ring, including the spin polarization, the persistent charge and spin currents (PCC and PSC). These ground-state properties can be given based on four kinds of electron numbers in rings. The effect of the self-inductance of the ring leads to the self-sustained magnetic flux (SSMF) and the self-sustained PCC and PSC, which break spontaneously time-reversal symmetry to form orbital magnetic phase (OMP). To tune the spin-orbit coupling strength or electron number of the ring can induce the phase transition between the OMP and non-OMP. For exact one-dimensional rings we find the coexistence of the pure PSC and SSMF. This property of the pure PSC may provide a new scheme to measure the pure PSC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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