发表机构
Dipartimento di Scienza Applicata e Tecnologia del Politecnico di Torino（都灵理工大学应用科学与技术系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究探究轴向磁场下邻近化半导体纳米线构成的正常-超导体结的安德烈夫反射与非线性电导，发现自旋轨道场方向是调控其输运的有效旋钮，可实现电可调范围广的器件。
AI 中文摘要
我们研究了由沿轴向磁场暴露的邻近化半导体纳米线构成的正常-超导体结中的安德烈夫反射（AR）与非线性电导。研究表明，零能时AR系数由结中超导侧的拓扑相决定；有限能时，AR受正常侧与邻近化侧的拉什巴自旋轨道场方向强烈影响。当邻近化侧处于拓扑平庸相时，AR与非线性电导随自旋轨道失配角的可调性尤为显著。自旋轨道场方向被证实是控制混合结中电子输运的有效旋钮，可实现电可调范围广的器件，文中还讨论了其在实际装置中的应用。
英文摘要
We investigate the Andreev reflection (AR) and the nonlinear conductance in a normal-superconductor junction realized with a proximitized semiconductor nanowire exposed to a magnetic field along its axis. We show that, while at zero energy the AR coefficient is determined by the topological phase of the superconducting side of the junction, at finite energy the AR is strongly affected by the directions of the Rashba spin-orbit field characterizing the normal and the proximitized sides. The tunability of the AR and the nonlinear conductance as a function of the spin-orbit misalignment angle is particularly pronounced when the proximitized side is in the topologically trivial phase. The spin-orbit field direction is revealed to be an efficient knob to control the electron transport through the hybrid junction, realizing an electrically widely tunable device. The implementation in realistic setups is discussed.
Comments19 pages, 4 figures
