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

doi:10.1103/y9l1-rvtq

Hedgehog-like spin texture in Sb-doped MnBi$_2$Te$_4$

Materials Science 2025-07-25 v1

Authors: 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

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Abstract

We employ spin- and angle-resolved photoemission spectroscopy and circular-dichroism ARPES to systematically investigate the spin texture of Sb-doped MnBi $_2$ Te $_4$ . 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.

Keywords

spin texture Sb-doped MnBi$_2$Te$_4$ time-reversal symmetry breaking quantum anomalous Hall effect ARPES

Cite

@article{arxiv.2502.06416,
  title  = {Hedgehog-like spin texture in Sb-doped MnBi$_2$Te$_4$},
  author = {Meng Zeng and Shu Mo and Ke Zhang and Yu-Jie Hao and Yu-Peng Zhu and Xiang-Rui Liu and Cheng Zhang and Ming-Yuan Zhu and Shiv Kumar and Takuma Iwata and Koji Miyamoto and Taichi Okuda and Kenya Shimada and Kenta Kuroda and Xiao-Ming Ma and Chang Liu},
  journal= {arXiv preprint arXiv:2502.06416},
  year   = {2025}
}

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12 pages, 4 figures

Hedgehog-like spin texture in Sb-doped MnBi$_2$Te$_4$

Abstract

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