Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
Spin-Orbit Splitting of Andreev States Revealed by Microwave Spectroscopy
复制标题
DOI：
10.1103/physrevx.9.011010
复制
发表时间：
2018-10
影响因子：
12.5
通讯作者：
L. Tosi;C. Metzger;M. Goffman;C. Urbina;H. Pothier;Sunghun Park;A. Yeyati;P. Krogstrup;J. Nygår
中科院分区：
文献类型：
--
作者：
L. Tosi;C. Metzger;M. Goffman;C. Urbina;H. Pothier;Sunghun Park;A. Yeyati;P. Krogstrup;J. Nygår
We have performed microwave spectroscopy of Andreev states in superconducting weak links tailored in an InAs-Al (core-full shell) epitaxially-grown nanowire. The spectra present distinctive features, with bundles of four lines crossing when the superconducting phase difference across the weak link is 0 or $\pi.$ We interpret these as arising from zero-field spin-split Andreev states. A simple analytical model, which takes into account the Rashba spin-orbit interaction in a nanowire containing several transverse subbands, explains these features and their evolution with magnetic field. Our results show that the spin degree of freedom is addressable in Josephson junctions, and constitute a first step towards its manipulation.
