| Autor: |
Nevola, D., Li, H. X., Yan, J. -Q., Moore, R. G., Lee, H. -N., Miao, H., Johnson, P. D. |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 125, 117205 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.125.117205 |
| Popis: |
Surface magnetism and its correlation with the electronic structure are critical to understand the gapless topological surface state in the intrinsic magnetic topological insulator MnBi$_2$Te$_4$. Here, using static and time resolved angle-resolved photoemission spectroscopy (ARPES), we find a significant ARPES intensity change together with a gap opening on a Rashba-like conduction band. Comparison with a model simulation strongly indicates that the surface magnetism on cleaved MnBi$_2$Te$_4$ is the same as its bulk state. The coexistence of surface ferromagnetism and a gapless TSS uncovers the novel complexity of MnBi$_2$Te$_4$ that may be responsible for the low quantum anomalous Hall temperature of exfoliated MnBi$_2$Te$_4$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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