X-Ray Magnetic Circular Dichroism in Altermagnetic α-MnTe

被引：52

作者：

Hariki, A. ^{[1
]}

Dal Din, A. ^{[2
]}

Amin, O. J. ^{[2
]}

Yamaguchi, T. ^{[1
]}

Badura, A. ^{[3
]}

Kriegner, D. ^{[3
]}

Edmonds, K. W. ^{[2
]}

Campion, R. P. ^{[2
]}

Wadley, P. ^{[2
]}

Backes, D. ^{[4
]}

Veiga, L. S. I. ^{[4
]}

Dhesi, S. S.

Springholz, G. ^{[5
]}

Smejkal, L. ^{[3
,6
]}

Vyborny, K. ^{[3
]}

Jungwirth, T. ^{[2
,3
]}

Kune, J. ^{[7
,8
]}

机构：

[1] Osaka Metropolitan Univ, Grad Sch Engn, Dept Phys & Elect, 1-1 Gakuen Cho,Naka Ku, Sakai, Osaka 5998531, Japan

[2] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[3] Czech Acad Sci, Inst Phys, Cukrovarnicka 10, Prague 6, Czech Republic

[4] Diamond Light Source, Chilton OX11 0DE, England

[5] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, Altenbergerstr 69, A-4040 Linz, Austria

[6] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[7] Inst Solid State Phys, TU Wien, A-1040 Vienna, Austria

[8] Masaryk Univ, Fac Sci, Dept Condensed Matter Phys, Kotlarska 2, Brno 61137, Czech Republic

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 17期

基金：

奥地利科学基金会;

关键词：

NIAS-TYPE MNTE; ELECTRONIC-STRUCTURE; SPECTROSCOPY; DEPENDENCE; ABSORPTION;

D O I：

10.1103/PhysRevLett.132.176701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Altermagnetism is a recently identified magnetic symmetry class combining characteristics of conventional collinear ferromagnets and antiferromagnets, that were regarded as mutually exclusive, and enabling phenomena and functionalities unparalleled in either of the two traditional elementary magnetic classes. In this work we use symmetry, ab initio theory, and experiments to explore x-ray magnetic circular dichroism (XMCD) in the altermagnetic class. As a representative material for our XMCD study we choose alpha-MnTe with compensated antiparallel magnetic order in which an anomalous Hall effect has been already demonstrated. We predict and experimentally confirm a characteristic XMCD line shape for compensated moments lying in a plane perpendicular to the light propagation vector. Our results highlight the distinct phenomenology in altermagnets of this time-reversal symmetry breaking response, and its potential utility for element-specific spectroscopy and microscopy.

引用

页数：7

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