自旋轨道耦合弱链中的自旋进动：库仑排斥和泡利猝灭
Spin precession in spin-orbit coupled weak links: Coulomb repulsion and Pauli quenching
摘要：
提出了一个简单的电子对通过由具有强电子自旋-轨道相互作用（SOI）材料制成的纳米线形式的弱电连接传输的模型，重点讨论了库仑相互作用和泡利不相容原理的影响.当两个电子的空间波包明显重叠时，由于泡利原理的约束被示出为“淬灭”相干SOI诱导的自旋进动。猝灭是由对的自旋状态投射到链路上的自旋向上和自旋向下状态上而产生的，它将链路中的相干传播分解成一系列相干跳，这些跳是不相干地相加的。将该模型应用于两个超导体之间的库珀对的传输，我们发现，尽管泡利淬火，约瑟夫森电流振荡的SOI的强度，甚至可能改变其符号。这些功能的实验检测的条件进行了讨论。
英文摘要：
A simple model for the transmission of pairs of electrons through a weak electric link in the form of a nanowire made of a material with strong electron spin-orbit interaction (SOI) is presented, with emphasis on the effects of Coulomb interactions and the Pauli exclusion principle. The constraints due to the Pauli principle are shown to "quench" the coherent SOI-induced precession of the spins when the spatial wave packets of the two electrons overlap significantly. The quenching, which results from the projection of the pair's spin states onto spin-up and spin-down states on the link, breaks up the coherent propagation in the link into a sequence of coherent hops that add incoherently. Applying the model to the transmission of Cooper pairs between two superconductors, we find that in spite of Pauli quenching, the Josephson current oscillates with the strength of the SOI, and may even change its sign. Conditions for an experimental detection of these features are discussed.
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