Reconstructing the wavefunction of magnetic topological insulators MnBi2Te4 and MnBi4Te7 using spin-resolved photoemission
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
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| _version_ | 1866908646441484288 |
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| author | Han, Xue Qu, Jason Tan, Hengxin Tao, Zicheng Meyer, Noah M. Kirchmann, Patrick S. Guo, Yanfeng Yan, Binghai Shen, Zhi-Xun Sobota, Jonathan A. |
| author_facet | Han, Xue Qu, Jason Tan, Hengxin Tao, Zicheng Meyer, Noah M. Kirchmann, Patrick S. Guo, Yanfeng Yan, Binghai Shen, Zhi-Xun Sobota, Jonathan A. |
| contents | Despite their importance for exotic quantum effects, the surface electronic structure of magnetic topological insulators MnBi2Te4 and MnBi4Te7 remains poorly understood. Using high-efficiency spin- and angle-resolved photoemission spectroscopy, we directly image the spin-polarization and orbital character of the surface states in both compounds and map our observations onto a model wavefunction to describe the complex spin-orbital texture, which solidifies our understanding of the surface band structure by establishing the single-band nature of the most prominent states. Most importantly, our analysis reveals a new mechanism for reducing the magnetic gap of the topological surface states based on the orbital composition of the wavefunction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_02466 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Reconstructing the wavefunction of magnetic topological insulators MnBi2Te4 and MnBi4Te7 using spin-resolved photoemission Han, Xue Qu, Jason Tan, Hengxin Tao, Zicheng Meyer, Noah M. Kirchmann, Patrick S. Guo, Yanfeng Yan, Binghai Shen, Zhi-Xun Sobota, Jonathan A. Materials Science Despite their importance for exotic quantum effects, the surface electronic structure of magnetic topological insulators MnBi2Te4 and MnBi4Te7 remains poorly understood. Using high-efficiency spin- and angle-resolved photoemission spectroscopy, we directly image the spin-polarization and orbital character of the surface states in both compounds and map our observations onto a model wavefunction to describe the complex spin-orbital texture, which solidifies our understanding of the surface band structure by establishing the single-band nature of the most prominent states. Most importantly, our analysis reveals a new mechanism for reducing the magnetic gap of the topological surface states based on the orbital composition of the wavefunction. |
| title | Reconstructing the wavefunction of magnetic topological insulators MnBi2Te4 and MnBi4Te7 using spin-resolved photoemission |
| topic | Materials Science |
| url | https://arxiv.org/abs/2506.02466 |