Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators

被引：5

作者：

Brehm, Verena ^{[1
]}

Gomonay, Olena ^{[2
]}

Lepadatu, Serban ^{[3
]}

Klaeui, Mathias ^{[1
,2
]}

Sinova, Jairo ^{[2
]}

Brataas, Arne ^{[1
]}

Qaiumzadeh, Alireza ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Ctr Quantum Spintron, Dept Phys, Hogskoleringen 5, N-7491 Trondheim, Norway

[2] Johannes Gutenberg Univ Mainz, Inst Phys, Staudingerweg 7, D-55128 Mainz, Germany

[3] Univ Cent Lancashire, Jeremiah Horrocks Inst Math Phys & Astron, Preston PR1 2HE, England

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 18期

关键词：

Antiferromagnetism; -; Polarization;

D O I：

10.1103/PhysRevB.107.184404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnon eigenmodes in easy-plane antiferromagnetic insulators are linearly polarized and are not expected to carry any net spin angular momentum. Motivated by recent nonlocal spin transport experiments in the easy -plane phase of hematite, we perform a series of micromagnetic simulations in a nonlocal geometry at finite temperatures. We show that by tuning an external magnetic field, we can control the magnon eigenmodes and the polarization of the spin transport signal in these systems. We argue that a coherent beating oscillation between two orthogonal linearly polarized magnon eigenmodes is the mechanism responsible for finite spin transport in easy-plane antiferromagnetic insulators. The sign of the detected spin signal is also naturally explained by the proposed coherent beating mechanism. Our finding opens a path for on-demand control of the spin signal in a large class of easy-plane antiferromagnetic insulators.

引用

页数：7