Realization of a tunable surface Dirac gap in Sb-doped
MnBi 2 Te 4
Publication type: Journal Article
Publication date: 2021-03-17
scimago Q1
wos Q2
SJR: 1.303
CiteScore: 6.2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Abstract
Realization of the quantum anomalous Hall effect and axion electrodynamics in topological materials are among the paradigmatic phenomena in condensed matter physics. Recently, signatures of both phases are observed to exist in thin films of MnBi$_2$Te$_4$, a stoichiometric antiferromagnetic topological insulator. Direct evidence of the bulk topological magnetoelectric response in an axion insulator requires an energy gap at its topological surface state (TSS). However, independent spectroscopic experiments revealed that such a surface gap is absent, or much smaller than previously thought, in MnBi$_2$Te$_4$. Here, we utilize angle resolved photoemission spectroscopy and density functional theory calculations to demonstrate that a sizable TSS gap unexpectedly exists in Sb-doped MnBi$_2$Te$_4$. This gap is found to be topologically nontrivial, insensitive to the bulk antiferromagnetic-paramagnetic transition, while enlarges along with increasing Sb concentration. Our work shows that Mn(Bi$_{1-x}$Sb$_x$)$_2$Te$_4$ is a potential platform to observe the key features of the high-temperature axion insulator state, such as the topological magnetoelectric responses and half-integer quantum Hall effects.
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35
Total citations:
35
Citations from 2024:
12
(34%)
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Ma X. et al. Realization of a tunable surface Dirac gap in Sb-doped MnBi2Te4 // Physical Review B. 2021. Vol. 103. No. 12. L121112
GOST all authors (up to 50)
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Ma X., Zhao Y., Zhang K., Kumar S., Kumar S. K., Lu R., Li J., Yao Q., Shao J., Hou F., Wu X., Wu X. F., Zeng M., Hao Y., Hao Z., Wang Y., Wang Y., Liu X., Shen H., Sun H., Sun H., Jiawei Mei J. M., Miyamoto K., Okuda T., Arita M., Schwier E. F., shimada K., Deng K., Liu C., Lin J., Zhao Y., Chen C., Liu Q., Liu C. Realization of a tunable surface Dirac gap in Sb-doped MnBi2Te4 // Physical Review B. 2021. Vol. 103. No. 12. L121112
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RIS
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TY - JOUR
DO - 10.1103/PhysRevB.103.L121112
UR - https://doi.org/10.1103/PhysRevB.103.L121112
TI - Realization of a tunable surface Dirac gap in Sb-doped MnBi2Te4
T2 - Physical Review B
AU - Ma, Xiao-Ming
AU - Zhao, Yufei
AU - Zhang, Ke
AU - Kumar, Shiv
AU - Kumar, Shiv K.
AU - Lu, Ruie
AU - Li, Jiayu
AU - Yao, Qiushi
AU - Shao, Jifeng
AU - Hou, Fuchen
AU - Wu, Xuefeng
AU - Wu, X. F.
AU - Zeng, Meng
AU - Hao, Yujie
AU - Hao, Zhanyang
AU - Wang, Yuan
AU - Wang, Yuan
AU - Liu, Xiang-Rui
AU - Shen, Huiwen
AU - Sun, Hongyi
AU - Sun, Hong-Yi
AU - Jiawei Mei, Jiawei Mei
AU - Miyamoto, Koji
AU - Okuda, T.
AU - Arita, Masashi
AU - Schwier, Eike. F.
AU - shimada, K.
AU - Deng, Ke
AU - Liu, Cai
AU - Lin, Junhao
AU - Zhao, Yue
AU - Chen, Chao-Yu
AU - Liu, Qihang
AU - Liu, Chang
PY - 2021
DA - 2021/03/17
PB - American Physical Society (APS)
IS - 12
VL - 103
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2021_Ma,
author = {Xiao-Ming Ma and Yufei Zhao and Ke Zhang and Shiv Kumar and Shiv K. Kumar and Ruie Lu and Jiayu Li and Qiushi Yao and Jifeng Shao and Fuchen Hou and Xuefeng Wu and X. F. Wu and Meng Zeng and Yujie Hao and Zhanyang Hao and Yuan Wang and Yuan Wang and Xiang-Rui Liu and Huiwen Shen and Hongyi Sun and Hong-Yi Sun and Jiawei Mei Jiawei Mei and Koji Miyamoto and T. Okuda and Masashi Arita and Eike. F. Schwier and K. shimada and Ke Deng and Cai Liu and Junhao Lin and Yue Zhao and Chao-Yu Chen and Qihang Liu and Chang Liu},
title = {Realization of a tunable surface Dirac gap in Sb-doped MnBi2Te4},
journal = {Physical Review B},
year = {2021},
volume = {103},
publisher = {American Physical Society (APS)},
month = {mar},
url = {https://doi.org/10.1103/PhysRevB.103.L121112},
number = {12},
pages = {L121112},
doi = {10.1103/PhysRevB.103.L121112}
}