Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator
[Display omitted] Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effe...
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| Veröffentlicht in: | Science bulletin 2020-12, Vol.65 (24), p.2086-2093 |
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| creator | Xu, Lixuan Mao, Yuanhao Wang, Hongyuan Li, Jiaheng Chen, Yujie Xia, Yunyouyou Li, Yiwei Pei, Ding Zhang, Jing Zheng, Huijun Huang, Kui Zhang, Chaofan Cui, Shengtao Liang, Aiji Xia, Wei Su, Hao Jung, Sungwon Cacho, Cephise Wang, Meixiao Li, Gang Xu, Yong Guo, Yanfeng Yang, Lexian Liu, Zhongkai Chen, Yulin Jiang, Mianheng |
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Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effect and axion insulator phase ignited intensive study on this family of TQM compounds. Here, we investigated the AFM compound MnBi4Te7 where Bi2Te3 and MnBi2Te4 layers alternate to form a superlattice. Using spatial- and angle-resolved photoemission spectroscopy, we identified ubiquitous (albeit termination dependent) topological electronic structures from both Bi2Te3 and MnBi2Te4 terminations. Unexpectedly, while the bulk bands show strong temperature dependence correlated with the AFM transition, the topological surface states with a diminishing gap show negligible temperature dependence across the AFM transition. Together with the results of its sister compound MnBi2Te4, we illustrate important aspects of electronic structures and the effect of magnetic ordering in this family of magnetic TQMs. |
| doi_str_mv | 10.1016/j.scib.2020.07.032 |
| format | Article |
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Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effect and axion insulator phase ignited intensive study on this family of TQM compounds. Here, we investigated the AFM compound MnBi4Te7 where Bi2Te3 and MnBi2Te4 layers alternate to form a superlattice. Using spatial- and angle-resolved photoemission spectroscopy, we identified ubiquitous (albeit termination dependent) topological electronic structures from both Bi2Te3 and MnBi2Te4 terminations. Unexpectedly, while the bulk bands show strong temperature dependence correlated with the AFM transition, the topological surface states with a diminishing gap show negligible temperature dependence across the AFM transition. Together with the results of its sister compound MnBi2Te4, we illustrate important aspects of electronic structures and the effect of magnetic ordering in this family of magnetic TQMs.</description><identifier>ISSN: 2095-9273</identifier><identifier>EISSN: 2095-9281</identifier><identifier>DOI: 10.1016/j.scib.2020.07.032</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Electronic band structure ; Magnetic topological insulator ; Quantum anomalous Hall effect ; Spatially resolved angle-resolved photoemission spectroscopy</subject><ispartof>Science bulletin, 2020-12, Vol.65 (24), p.2086-2093</ispartof><rights>2020 Science China Press</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c333t-bd867f1958be9e36ae9c2435d73c18e812c543b7d1d88c09ac67f400e9dd3f223</citedby><cites>FETCH-LOGICAL-c333t-bd867f1958be9e36ae9c2435d73c18e812c543b7d1d88c09ac67f400e9dd3f223</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids></links><search><creatorcontrib>Xu, Lixuan</creatorcontrib><creatorcontrib>Mao, Yuanhao</creatorcontrib><creatorcontrib>Wang, Hongyuan</creatorcontrib><creatorcontrib>Li, Jiaheng</creatorcontrib><creatorcontrib>Chen, Yujie</creatorcontrib><creatorcontrib>Xia, Yunyouyou</creatorcontrib><creatorcontrib>Li, Yiwei</creatorcontrib><creatorcontrib>Pei, Ding</creatorcontrib><creatorcontrib>Zhang, Jing</creatorcontrib><creatorcontrib>Zheng, Huijun</creatorcontrib><creatorcontrib>Huang, Kui</creatorcontrib><creatorcontrib>Zhang, Chaofan</creatorcontrib><creatorcontrib>Cui, Shengtao</creatorcontrib><creatorcontrib>Liang, Aiji</creatorcontrib><creatorcontrib>Xia, Wei</creatorcontrib><creatorcontrib>Su, Hao</creatorcontrib><creatorcontrib>Jung, Sungwon</creatorcontrib><creatorcontrib>Cacho, Cephise</creatorcontrib><creatorcontrib>Wang, Meixiao</creatorcontrib><creatorcontrib>Li, Gang</creatorcontrib><creatorcontrib>Xu, Yong</creatorcontrib><creatorcontrib>Guo, Yanfeng</creatorcontrib><creatorcontrib>Yang, Lexian</creatorcontrib><creatorcontrib>Liu, Zhongkai</creatorcontrib><creatorcontrib>Chen, Yulin</creatorcontrib><creatorcontrib>Jiang, Mianheng</creatorcontrib><title>Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator</title><title>Science bulletin</title><description>[Display omitted]
Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effect and axion insulator phase ignited intensive study on this family of TQM compounds. Here, we investigated the AFM compound MnBi4Te7 where Bi2Te3 and MnBi2Te4 layers alternate to form a superlattice. Using spatial- and angle-resolved photoemission spectroscopy, we identified ubiquitous (albeit termination dependent) topological electronic structures from both Bi2Te3 and MnBi2Te4 terminations. Unexpectedly, while the bulk bands show strong temperature dependence correlated with the AFM transition, the topological surface states with a diminishing gap show negligible temperature dependence across the AFM transition. Together with the results of its sister compound MnBi2Te4, we illustrate important aspects of electronic structures and the effect of magnetic ordering in this family of magnetic TQMs.</description><subject>Electronic band structure</subject><subject>Magnetic topological insulator</subject><subject>Quantum anomalous Hall effect</subject><subject>Spatially resolved angle-resolved photoemission spectroscopy</subject><issn>2095-9273</issn><issn>2095-9281</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kMtOwzAQRSMEEhX0B1hlyaapH0mdSGyg4iUVwaKsLdeetFOldrDdIv4ehyKWrO5odM5Ic7PsipKCEjqbbougcVUwwkhBREE4O8lGjDTVpGE1Pf2bBT_PxiFsCSG0bFhJxCg7vIEPGCLYmIe9b5WGPEQVIeSfGDe5wR1aDBu063yt-hxt_mLvkC2hnP4ET1oPvlMxYnKVjdiC926n1hbSKo-ud51bo1ZdssM-kc5fZmet6gKMf_Mie3-4X86fJovXx-f57WKiOedxsjL1TLS0qeoVNMBnChrNSl4ZwTWtoaZMVyVfCUNNXWvSKJ3wkhBojOEtY_wiuz7e7b372EOIcodBQ9cpC24fJBOCU8ZYVSeUHVHtXQgeWtl73Cn_JSmRQ89yK4ee5dCzJEKmnpN0c5QgPXFA8AMCVoNBDzpK4_A__RseP4hy</recordid><startdate>20201230</startdate><enddate>20201230</enddate><creator>Xu, Lixuan</creator><creator>Mao, Yuanhao</creator><creator>Wang, Hongyuan</creator><creator>Li, Jiaheng</creator><creator>Chen, Yujie</creator><creator>Xia, Yunyouyou</creator><creator>Li, Yiwei</creator><creator>Pei, Ding</creator><creator>Zhang, Jing</creator><creator>Zheng, Huijun</creator><creator>Huang, Kui</creator><creator>Zhang, Chaofan</creator><creator>Cui, Shengtao</creator><creator>Liang, Aiji</creator><creator>Xia, Wei</creator><creator>Su, Hao</creator><creator>Jung, Sungwon</creator><creator>Cacho, Cephise</creator><creator>Wang, Meixiao</creator><creator>Li, Gang</creator><creator>Xu, Yong</creator><creator>Guo, Yanfeng</creator><creator>Yang, Lexian</creator><creator>Liu, Zhongkai</creator><creator>Chen, Yulin</creator><creator>Jiang, Mianheng</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20201230</creationdate><title>Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator</title><author>Xu, Lixuan ; 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Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effect and axion insulator phase ignited intensive study on this family of TQM compounds. Here, we investigated the AFM compound MnBi4Te7 where Bi2Te3 and MnBi2Te4 layers alternate to form a superlattice. Using spatial- and angle-resolved photoemission spectroscopy, we identified ubiquitous (albeit termination dependent) topological electronic structures from both Bi2Te3 and MnBi2Te4 terminations. Unexpectedly, while the bulk bands show strong temperature dependence correlated with the AFM transition, the topological surface states with a diminishing gap show negligible temperature dependence across the AFM transition. Together with the results of its sister compound MnBi2Te4, we illustrate important aspects of electronic structures and the effect of magnetic ordering in this family of magnetic TQMs.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.scib.2020.07.032</doi><tpages>8</tpages></addata></record> |
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| subjects | Electronic band structure Magnetic topological insulator Quantum anomalous Hall effect Spatially resolved angle-resolved photoemission spectroscopy |
| title | Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator |
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