塞曼效应
安德列夫反射
凝聚态物理
物理
超导电性
拉希巴效应
自旋轨道相互作用
自旋(空气动力学)
约瑟夫森效应
电导
塞曼能源
电场
磁场
量子力学
自旋电子学
铁磁性
热力学
作者
Takahiro Hashimoto,A. A. Golubov,Yukio Tanaka,Jacob Linder
出处
期刊:Physical review
日期:2017-10-09
卷期号:96 (13)
被引量:4
标识
DOI:10.1103/physrevb.96.134508
摘要
We study Andreev reflection and Andreev levels $\ensuremath{\varepsilon}$ in Zeeman-split superconductor/Rashba wire/Zeeman split superconductor junctions by solving the Bogoliubov--de Gennes equation. We theoretically demonstrate that the Andreev levels $\ensuremath{\varepsilon}$ can be controlled by tuning either the strength of Rashba spin-orbit interaction or the relative direction of the Rashba spin-orbit interaction and the Zeeman field. In particular, it is found that the magnitude of the band splitting is tunable by the strength of the Rashba spin-orbit interaction and the length of the wire, which can be interpreted by a spin precession in the Rashba wire. We also find that if the Zeeman field in the superconductor has the component parallel to the direction of the junction, the $\ensuremath{\varepsilon}\ensuremath{-}\ensuremath{\phi}$ curve becomes asymmetric with respect to the superconducting phase difference $\ensuremath{\phi}$. Whereas the Andreev reflection processes associated with each pseudospin band are sensitive to the relative orientation of the spin-orbit field and the exchange field, the total electric conductance interestingly remains invariant.
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