Novel magnetic topological insulator FeBi$_2$Te$_4$ with controllable topological quantum phase
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911975639875584 |
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| author | Guo, Wen-Ti Yang, Ningjing Huang, Zhigao Zhang, Jian-Min |
| author_facet | Guo, Wen-Ti Yang, Ningjing Huang, Zhigao Zhang, Jian-Min |
| contents | Here, we report a new intrinsic magnetic topological insulator FeBi$_2$Te$_4$ based on first-principles calculations and it can achieve a rich topological phase under pressure modulation. Without pressure, we predict that both FeBi$_2$Te$_4$ ferromagnetic and antiferromagnetic orders are non-trivial topological insulators. Furthermore, FeBi$_2$Te$_4$ of FM-z order will undergo a series of phase transitions from topological insulator to semimetals and then to trivial insulator under pressure. Finally, we further clarify and verify topological phase transitions with low-energy effective model calculations. This topological phase transition process is attributed to the synergy of the magnetic moment and the spin-orbit coupling. The unique topological properties of FeBi$_2$Te$_4$ will be of great interest in driving the development of quantum effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_06716 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Novel magnetic topological insulator FeBi$_2$Te$_4$ with controllable topological quantum phase Guo, Wen-Ti Yang, Ningjing Huang, Zhigao Zhang, Jian-Min Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Here, we report a new intrinsic magnetic topological insulator FeBi$_2$Te$_4$ based on first-principles calculations and it can achieve a rich topological phase under pressure modulation. Without pressure, we predict that both FeBi$_2$Te$_4$ ferromagnetic and antiferromagnetic orders are non-trivial topological insulators. Furthermore, FeBi$_2$Te$_4$ of FM-z order will undergo a series of phase transitions from topological insulator to semimetals and then to trivial insulator under pressure. Finally, we further clarify and verify topological phase transitions with low-energy effective model calculations. This topological phase transition process is attributed to the synergy of the magnetic moment and the spin-orbit coupling. The unique topological properties of FeBi$_2$Te$_4$ will be of great interest in driving the development of quantum effects. |
| title | Novel magnetic topological insulator FeBi$_2$Te$_4$ with controllable topological quantum phase |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2308.06716 |