Electrical and thermal transport in antiferromagnet-superconductor junctions

被引：24

作者：

Jakobsen, Martin F. ^{[1
]}

Naess, Kristian B. ^{[1
]}

Dutta, Paramita ^{[2
,3
]}

Brataas, Arne ^{[1
]}

Qaiumzadeh, Alireza ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Ctr Quantum Spintron, Dept Phys, NO-7491 Trondheim, Norway

[2] Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden

[3] Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, India

来源：

PHYSICAL REVIEW B | 2020年 / 102卷 / 14期

基金：

瑞典研究理事会; 欧洲研究理事会;

关键词：

ANDREEV REFLECTION; SPIN POLARIZATION; METAL; FERROMAGNET;

D O I：

10.1103/PhysRevB.102.140504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that antiferromagnet-superconductor (AF-S) junctions show qualitatively different transport properties than normal metal-superconductor (N-S) and ferromagnet-superconductor (F-S) junctions. We attribute these transport features to the presence of two different scattering processes in AF-S junctions, i.e., specular reflection of holes and retroreflection of electrons. Using the Blonder-Tinkham-Klapwijk formalism, we find that the electrical and thermal conductances depend nontrivially on antiferromagnetic exchange strength, voltage, and temperature bias. Furthermore, we show that the interplay between the Neel vector direction and the interfacial Rashba spin-orbit coupling leads to a large anisotropic magnetoresistance. The unusual transport properties make AF-S interfaces unique among the traditional condensed-matter-system-based superconducting junctions.

引用

页数：6

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