Hedgehog-like spin texture in Sb-doped MnBi$_2$Te$_4$
Meng Zeng, Shu Mo, Ke Zhang, Yu-Jie Hao, Yu-Peng Zhu, Xiang-Rui Liu, Cheng Zhang, Ming-Yuan Zhu, Shiv Kumar, Takuma Iwata, Koji Miyamoto, Taichi Okuda, Kenya Shimada, Kenta Kuroda, Xiao-Ming Ma, Chang Liu
TL;DR
This study uncovers a hedgehog-like spin texture in Sb-doped MnBi₂Te₄ using advanced ARPES techniques, revealing time-reversal symmetry breaking and potential for high-temperature quantum anomalous Hall effects.
Contribution
It provides the first systematic experimental evidence of a hedgehog-like spin texture in Sb-doped MnBi₂Te₄, indicating broken time-reversal symmetry.
Findings
Revealed hedgehog-like spin texture with reversed out-of-plane spins
Indicated broken time-reversal symmetry in the system
Suggested potential for high-temperature quantum anomalous Hall effect
Abstract
We employ spin- and angle-resolved photoemission spectroscopy and circular-dichroism ARPES to systematically investigate the spin texture of Sb-doped MnBiTe. Our results display a hedgehog-like spin texture in this system which is signified by reversed-orienting out-of-plane spins at the Dirac gap. Our finding reveals the presence of time-reversal symmetry breaking, implying the possibility for realization of high-temperature quantum anomalous Hall effect.
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