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Physical Review X, volume 9, issue 4, publication number 041038

Gapless Surface Dirac Cone in Antiferromagnetic Topological Insulator MnBi2Te4

Hao Yujie 1
Liu Pengfei 1
Liu Peng-fei 1
Feng Yue 1
Ma Xiao Ming 1
Ma Xiao-Ming 1
Schwier Eike F. 2
Arita Masashi 2
Kumar S. 2
Hu Chaowei 3
Hu Chao-Wei 3
Lu Rui’e 1
Meng Zeng 1
Wang Yuan 1
Hao Zhanyang 1
Sun Hong Yi 1
Sun Hong-Yi 1
Zhang Ke 2
Zhang Ke 2
Mei Jiawei 1
Ni Ni 3
Wu Liusuo 1
shimada K. 2
Chen Chao-Yu 1
LIU QIHANG 1, 4
2
 
Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-hiroshima 739-0046, Japan
3
 
Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles, California 90095, USA
Publication typeJournal Article
Publication date2019-11-21
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor12.5
ISSN21603308
General Physics and Astronomy
Abstract
The recent discovered antiferromagnetic topological insulators in Mn-Bi-Te family with intrinsic magnetic ordering have rapidly drawn broad interest since its cleaved surface state is believed to be gapped, hosting the unprecedented axion states with half-integer quantum Hall effect. Here, however, we show unambiguously by using high-resolution angle-resolved photoemission spectroscopy that a gapless Dirac cone at the (0001) surface of MnBi$_2$Te$_4$ exists between the bulk band gap. Such unexpected surface state remains unchanged across the bulk Neel temperature, and is even robust against severe surface degradation, indicating additional topological protection. Through symmetry analysis and $\textit{ab}$-$\textit{initio}$ calculations we consider different types of surface reconstruction of the magnetic moments as possible origins giving rise to such linear dispersion. Our results reveal that the intrinsic magnetic topological insulator hosts a rich platform to realize various topological phases such as topological crystalline insulator and time-reversal-preserved topological insulator, by tuning the magnetic configurations.

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GOST Copy
Hao Y. et al. Gapless Surface Dirac Cone in Antiferromagnetic Topological Insulator MnBi2Te4 // Physical Review X. 2019. Vol. 9. No. 4. 041038
GOST all authors (up to 50) Copy
Hao Y., Liu P., Liu P., Feng Y., Ma X., Ma X. M., Schwier E. F., Schwier E. F., Arita M., Kumar S., Hu C., Hu C., Lu R., Meng Z., Wang Y., Hao Z., Sun H. Y., Sun H., Zhang K., Zhang K., Jiawei Mei J. M., Mei J., Ni N., Wu L., shimada K., Chen C., LIU Q., Liu C. Gapless Surface Dirac Cone in Antiferromagnetic Topological Insulator MnBi2Te4 // Physical Review X. 2019. Vol. 9. No. 4. 041038
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevX.9.041038
UR - https://doi.org/10.1103%2FPhysRevX.9.041038
TI - Gapless Surface Dirac Cone in Antiferromagnetic Topological Insulator MnBi2Te4
T2 - Physical Review X
AU - Hao, Yujie
AU - Liu, Pengfei
AU - Ma, Xiao Ming
AU - Schwier, Eike F.
AU - Arita, Masashi
AU - Kumar, S.
AU - Hu, Chaowei
AU - Lu, Rui’e
AU - Hao, Zhanyang
AU - Sun, Hong Yi
AU - Zhang, Ke
AU - Wu, Liusuo
AU - shimada, K.
AU - Chen, Chao-Yu
AU - Liu, Chang
AU - Feng, Yue
AU - Meng, Zeng
AU - Wang, Yuan
AU - Mei, Jiawei
AU - LIU, QIHANG
AU - Liu, Peng-fei
AU - Ma, Xiao-Ming
AU - Schwier, Eike. F.
AU - Hu, Chao-Wei
AU - Sun, Hong-Yi
AU - Zhang, Ke
AU - Jiawei Mei, Jiawei Mei
AU - Ni, Ni
PY - 2019
DA - 2019/11/21 00:00:00
PB - American Physical Society (APS)
IS - 4
VL - 9
SN - 2160-3308
ER -
BibTex
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BibTex Copy
@article{2019_Hao
author = {Yujie Hao and Pengfei Liu and Xiao Ming Ma and Eike F. Schwier and Masashi Arita and S. Kumar and Chaowei Hu and Rui’e Lu and Zhanyang Hao and Hong Yi Sun and Ke Zhang and Liusuo Wu and K. shimada and Chao-Yu Chen and Chang Liu and Yue Feng and Zeng Meng and Yuan Wang and Jiawei Mei and QIHANG LIU and Peng-fei Liu and Xiao-Ming Ma and Eike. F. Schwier and Chao-Wei Hu and Hong-Yi Sun and Ke Zhang and Jiawei Mei Jiawei Mei and Ni Ni},
title = {Gapless Surface Dirac Cone in Antiferromagnetic Topological Insulator MnBi2Te4},
journal = {Physical Review X},
year = {2019},
volume = {9},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103%2FPhysRevX.9.041038},
number = {4},
doi = {10.1103/PhysRevX.9.041038}
}
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