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Broken Kramers Degeneracy in Altermagnetic MnTe

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Title
Broken Kramers Degeneracy in Altermagnetic MnTe
Author(s)
Suyoung Lee; Lee, Sangjae; Saegyeol Jung; Jiwon Jung; Donghan Kim; Yeonjae Lee; Byeongjun Seok; Jaeyoung Kim; Park, Byeong Gyu; Šmejkal, Libor; Kang, Chang-Jong; Changyoung Kim
Publication Date
2024-01
Journal
Physical Review Letters, v.132, no.3
Publisher
American Physical Society
Abstract
Altermagnetism is a newly identified fundamental class of magnetism with vanishing net magnetization and time-reversal symmetry broken electronic structure. Probing the unusual electronic structure with nonrelativistic spin splitting would be a direct experimental verification of an altermagnetic phase. By combining high-quality film growth and in situ angle-resolved photoemission spectroscopy, we report the electronic structure of an altermagnetic candidate, α-MnTe. Temperature-dependent study reveals the lifting of Kramers degeneracy accompanied by a magnetic phase transition at TN=267 K with spin splitting of up to 370 meV, providing direct spectroscopic evidence for altermagnetism in MnTe. © 2024 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/14901
DOI
10.1103/PhysRevLett.132.036702
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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