| Autor: |
Jiang, Qianni, Wang, Chong, Malinowski, Paul, Liu, Zhaoyu, Shi, Yue, Lin, Zhong, Fei, Zaiyao, Song, Tiancheng, Graf, David, Xu, Xiaodong, Yan, Jiaqiang, Xiao, Di, Chu, Jiun-Haw |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 103, 205111 (2021) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.103.205111 |
| Popis: |
The intrinsic antiferromagnetic topological insulator MnBi$_{2}$Te$_{4}$ undergoes a metamagnetic transition in a c-axis magnetic field. It has been predicted that ferromagnetic MnBi$_{2}$Te$_{4}$ is an ideal Weyl semimetal with a single pair of Weyl nodes. Here we report measurements of quantum oscillations detected in the field-induced ferromagnetic phase of MnBi$_{2-x}$Sb$_{x}$Te$_{4}$, where Sb substitution tunes the majority carriers from electrons to holes. Single frequency Shubnikov-de Haas oscillations were observed in a wide range of Sb concentrations (0.54 $\leq$ x $\leq$ 1.21). The evolution of the oscillation frequency and the effective mass shows reasonable agreement with the Weyl semimetal band-structure of ferromagnetic MnBi$_{2}$Te$_{4}$ predicted by density functional calculations. Intriguingly, the quantum oscillation frequency shows a strong temperature dependence, indicating that the electronic structure sensitively depends on magnetism. |
| Databáze: |
arXiv |
| Externí odkaz: |
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