报告题目:Multiple Andreev reflections in spin-split superconductors
报告人:吕博 特聘研究员(天津大学量子交叉研究中心)
报告时间:2020 年 11 月 05 日(周四)15:30
报告地点:在线报告( 腾讯会议 ID : 254 859 400)
报告摘要:
We study the transport properties of a voltage-biased contact between two spin-split superconductors separated by an insulating barrier of arbitrary transparency. At low transparency, the contribution of multiple Andreev reflections leads to a subharmonic gap structure that crucially depends on the amplitude and relative angle of the spin-splitting fields of each superconductor. For noncollinear fields, we find an interesting even-odd effect on the bound states within the gap, where the odd order multiple Andreev reflections split, but the even order ones remain at their expected positions
报告人简介:
吕博,本科毕业于南开大学,博士毕业于北京大学,博士毕业后先后在日本名古屋大学和英国曼切斯特大学从事博士后研究。2018年加入天津大学物理系量子交叉研究中心,担任特聘研究员,主要研究方向为超导近邻效应、拓扑材料输运、超导自旋电子学。
参考文献:
(1) Bo Lu, Pablo Burset, and Yukio Tanaka, Spin-polarized multiple Andreev reflections in spin-split superconductors, Phys. Rev. B 101, 020502(R) (2020).