Broken Kramers Degeneracy in Altermagnetic MnTe
Suyoung LeeCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaSangjae LeeCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaSaegyeol JungCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaJi-Won JungCenter for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 37673, KoreaDonghan KimCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaYeonjae LeeCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaByeongjun SeokCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, KoreaJae-Young KimCenter for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang 37673, KoreaByeong Gyu ParkPohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, KoreaLibor ŠmejkalInstitut für Physik, Johannes Gutenberg Universität Mainz, D-55099 Mainz, GermanyChang‐Jong KangDepartment of Physics, Chungnam National University, Daejeon 34134, KoreaChangyoung KimCenter for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Korea
2024en
ABI
Аннотация
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 T_{N}=267 K with spin splitting of up to 370 meV, providing direct spectroscopic evidence for altermagnetism in MnTe.
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