| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Experimental Realization of an Intrinsic Magnetic Topological Insulator |
| Yan Gong1, Jingwen Guo1, Jiaheng Li1, Kejing Zhu1, Menghan Liao1, Xiaozhi Liu2, Qinghua Zhang2, Lin Gu2, Lin Tang1, Xiao Feng1, Ding Zhang1,3,4, Wei Li1,4, Canli Song1,4, Lili Wang1,4, Pu Yu1,4, Xi Chen1,4, Yayu Wang1,3,4, Hong Yao4,5, Wenhui Duan1,3,4, Yong Xu1,4,6**, Shou-Cheng Zhang7, Xucun Ma1,4, Qi-Kun Xue1,3,4**, Ke He1,3,4** |
1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3Beijing Academy of Quantum Information Sciences, Beijing 100193
4Collaborative Innovation Center of Quantum Matter, Beijing 100084
5Institute for Advanced Study, Tsinghua University, Beijing 100084
6RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
7Stanford Center for Topological Quantum Physics, Department of Physics, Stanford University, Stanford, California 94305-4045, USA |
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| Cite this article: |
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Yan Gong, Jingwen Guo, Jiaheng Li et al 2019 Chin. Phys. Lett. 36 076801 |
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Abstract An intrinsic magnetic topological insulator (TI) is a stoichiometric magnetic compound possessing both inherent magnetic order and topological electronic states. Such a material can provide a shortcut to various novel topological quantum effects but remained elusive experimentally for a long time. Here we report the experimental realization of thin films of an intrinsic magnetic TI, MnBi$_{2}$Te$_{4}$, by alternate growth of a Bi$_{2}$Te$_{3}$ quintuple layer and a MnTe bilayer with molecular beam epitaxy. The material shows the archetypical Dirac surface states in angle-resolved photoemission spectroscopy and is demonstrated to be an antiferromagnetic topological insulator with ferromagnetic surfaces by magnetic and transport measurements as well as first-principles calculations. The unique magnetic and topological electronic structures and their interplays enable the material to embody rich quantum phases such as quantum anomalous Hall insulators and axion insulators at higher temperature and in a well-controlled way.
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Received: 27 May 2019
Published: 04 June 2019
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| PACS: |
68.35.bg
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(Semiconductors)
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73.23.Ad
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(Ballistic transport)
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71.20.Nr
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(Semiconductor compounds)
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73.20.At
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(Surface states, band structure, electron density of states)
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| Fund: Supported by the Ministry of Science and Technology of China, the National Science Foundation of China, and the Beijing Advanced Innovation Center for Future Chip (ICFC). |
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| [1] | Hasan M Z and Kane C L 2010 Rev. Mod. Phys. 82 3045 | | [2] | Qi X L and Zhang S C 2011 Rev. Mod. Phys. 83 1057 | | [3] | Qi X L, Hughes T L and Zhang S C 2008 Phys. Rev. B 78 195424 | | [4] | Haldane F D M 1988 Phys. Rev. Lett. 61 2015 | | [5] | Liu C X, Qi X L, Dai X, Fang Z and Zhang S C 2008 Phys. Rev. Lett. 101 146802 | | [6] | Yu R et al 2010 Science 329 61 | | [7] | Chang C Z et al 2013 Science 340 167 | | [8] | Qi X L, Hughes T L and Zhang S C 2010 Phys. Rev. B 82 184516 | | [9] | He Q L et al 2017 Science 357 294 | | [10] | Lee I et al 2015 Proc. Natl. Acad. Sci. USA 112 1316 | | [11] | Lachman E O et al 2015 Sci. Adv. 1 e1500740 | | [12] | Grauer S et al 2015 Phys. Rev. B 92 201304 | | [13] | Feng X et al 2016 Adv. Mater. 28 6386 | | [14] | Liu Y et al 2018 Nature 555 638 | | [15] | Tang P, Zhou Q, Xu G and Zhang S C 2016 Nat. Phys. 12 1100 | | [16] | Xu G, Weng H, Wang Z, Dai X and Fang Z 2011 Phys. Rev. Lett. 107 186806 | | [17] | Neupane M et al 2012 Phys. Rev. B 85 235406 | | [18] | Lee D S et al 2013 CrystEngComm 15 5532 | | [19] | Hagmann J A et al 2017 New J. Phys. 19 085002 | | [20] | Hirahara T et al 2017 Nano Lett. 17 3493 | | [21] | Otrokov M et al 2017 2D Mater. 4 025082 | | [22] | Li Y Y et al 2010 Adv. Mater. 22 4002 | | [23] | Zhang H et al 2009 Nat. Phys. 5 438 | | [24] | Chen Y L et al 2009 Science 325 178 | | [25] | Fu L 2009 Phys. Rev. Lett. 103 266801 | | [26] | Chen J et al 2010 Phys. Rev. Lett. 105 176602 | | [27] | Nagaosa N, Sinova J, Onoda S, MacDonald A H and Ong N P 2010 Rev. Mod. Phys. 82 1539 | | [28] | Li J et al 2019 Sci. Adv. (to be published) ( 2018 arXiv:1808.08608 [cond-mat.mtrl-sci]) | | [29] | Zhang D et al 2019 Phys. Rev. Lett. 122 206401 | | [30] | Huang B et al 2017 Nature 546 270 |
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