Physical Review B, volume 102, issue 24, publication number 245136
Hybridization-induced gapped and gapless states on the surface of magnetic topological insulators
Publication type: Journal Article
Publication date: 2020-12-22
Journal:
Physical Review B
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Abstract
The layered MnBi2nTe3n+1 family represents the first intrinsic antiferromagnetic topological insulator (AFM TI, protected by a combination symmetry ) ever discovered, providing an ideal platform to explore novel physics such as quantum anomalous Hall effect at elevated temperature and axion electrodynamics. Recent angle-resolved photoemission spectroscopy (ARPES) experiments on this family have revealed that all terminations exhibit (nearly) gapless topological surface states (TSSs) within the AFM state, violating the definition of the AFM TI, as the surfaces being studied should be -breaking and opening a gap. Here we explain this curious paradox using a surface-bulk band hybridization picture. Combining ARPES and first-principles calculations, we prove that only an apparent gap is opened by hybridization between TSSs and bulk bands. The observed (nearly) gapless features are consistently reproduced by tight-binding simulations where TSSs are coupled to a Rashba-split bulk band. The Dirac-cone-like spectral features are actually of bulk origin, thus not sensitive to the-breaking at the AFM surfaces. This picture explains the (nearly) gapless behaviour found in both Bi2Te3- and MnBi2Te4-terminated surfaces and is applicable to all terminations of MnBi2nTe3n+1 family. Our findings highlight the role of band hybridization, superior to magnetism in this case, in shaping the general surface band structure in magnetic topological materials for the first time.
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Citations by publishers
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1 publication, 4%
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Ma X. et al. Hybridization-induced gapped and gapless states on the surface of magnetic topological insulators // Physical Review B. 2020. Vol. 102. No. 24. 245136
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Ma X., Chen Z., Schwier E. F., Schwier E. F., Zhang Y., Hao Y., Kumar S., Lu R., Lu R., Shao J., Jin Y., Zeng M., Liu X. R., Liu X., Hao Z., Zhang K., Zhang K., Mansuer W., Song C., Wang Y., Zhao B., Liu C., Deng K., Mei J., Jiawei Mei J. M., shimada K., Zhao Y., Zhou X., Shen B., Huang W., Liu C., Xu H., Chen C. Hybridization-induced gapped and gapless states on the surface of magnetic topological insulators // Physical Review B. 2020. Vol. 102. No. 24. 245136
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TY - JOUR
DO - 10.1103/PhysRevB.102.245136
UR - https://doi.org/10.1103%2FPhysRevB.102.245136
TI - Hybridization-induced gapped and gapless states on the surface of magnetic topological insulators
T2 - Physical Review B
AU - Schwier, Eike F.
AU - Zhang, Y.
AU - Hao, Yujie
AU - Kumar, S.
AU - Jin, Yuanjun
AU - Zeng, Meng
AU - Zhang, Ke
AU - Mansuer, Wumiti
AU - Song, Chunyao
AU - Zhao, Boyan
AU - Liu, Cai
AU - Deng, Ke
AU - shimada, K.
AU - Zhou, Xingjiang
AU - Shen, Bing
AU - Huang, Wen
AU - Liu, Chang
AU - Xu, Hu
AU - Chen, Chao-Yu
AU - Liu, Xiang Rui
AU - Ma, Xiao-Ming
AU - Chen, Z. J.
AU - Lu, Rui’e
AU - Shao, Jifeng
AU - Hao, Zhanyang
AU - Wang, Yuan
AU - Mei, Jiawei
AU - Zhao, Yue
AU - Schwier, Eike. F.
AU - Lu, Ruie
AU - Liu, Xiangrui
AU - Zhang, Ke
AU - Jiawei Mei, Jiawei Mei
PY - 2020
DA - 2020/12/22 00:00:00
PB - American Physical Society (APS)
IS - 24
VL - 102
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2020_Ma,
author = {Eike F. Schwier and Y. Zhang and Yujie Hao and S. Kumar and Yuanjun Jin and Meng Zeng and Ke Zhang and Wumiti Mansuer and Chunyao Song and Boyan Zhao and Cai Liu and Ke Deng and K. shimada and Xingjiang Zhou and Bing Shen and Wen Huang and Chang Liu and Hu Xu and Chao-Yu Chen and Xiang Rui Liu and Xiao-Ming Ma and Z. J. Chen and Rui’e Lu and Jifeng Shao and Zhanyang Hao and Yuan Wang and Jiawei Mei and Yue Zhao and Eike. F. Schwier and Ruie Lu and Xiangrui Liu and Ke Zhang and Jiawei Mei Jiawei Mei},
title = {Hybridization-induced gapped and gapless states on the surface of magnetic topological insulators},
journal = {Physical Review B},
year = {2020},
volume = {102},
publisher = {American Physical Society (APS)},
month = {dec},
url = {https://doi.org/10.1103%2FPhysRevB.102.245136},
number = {24},
doi = {10.1103/PhysRevB.102.245136}
}