Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals

被引：116

作者：

Diaz, Sebastian A. ^{[1
]}

Klinovaja, Jelena ^{[1
]}

Loss, Daniel ^{[1
]}

机构：

[1] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 18期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”;

关键词：

Antiferromagnetics - Antiferromagnets - Chern numbers - Dzyaloshinskii-Moriya interaction - Experimental realizations - Magnetic phasis - Magnetic textures - Noncollinear;

D O I：

10.1103/PhysRevLett.122.187203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Antiferromagnetic skyrmion crystals are magnetic phases predicted to exist in antiferromagnets with Dzyaloshinskii-Moriya interactions. Their spatially periodic noncollinear magnetic texture gives rise to topological bulk magnon bands characterized by nonzero Chern numbers. We find topologically protected chiral magnonic edge states over a wide range of magnetic fields and Dzyaloshinskii-Moriya interaction values. Moreover, and of particular importance for experimental realizations, edge states appear at the lowest possible energies, namely, within the first bulk magnon gap. Thus, antiferromagnetic skyrmion crystals show great promise as novel platforms for topological magnonics.

引用

页数：6

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