Metamagnetic quantum criticality in the antiferromagnetic topological insulator MnBi$_2$Te$_4$
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866909489569988608 |
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| author | Das, Tithiparna Mukhopadhyay, Soumik |
| author_facet | Das, Tithiparna Mukhopadhyay, Soumik |
| contents | Combining transport and magnetization measurements, we discover the emergence of a tricritical point connecting the antiferromagnetic, metamagnetic and paramagnetic regions in MnBi$_2$Te$_4$, a magnetic topological insulator candidate which can potentially exhibit axion electrodynamics. We observe a unique magnetic field-driven phase diagram where the second-order antiferromagnetic to paramagnetic phase boundary bifurcates into two first-order lines at the tricritical point. The two first-order lines enclosing the metamagnetic phase eventually terminate at the quantum critical endpoints with the application of magnetic field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_08383 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Metamagnetic quantum criticality in the antiferromagnetic topological insulator MnBi$_2$Te$_4$ Das, Tithiparna Mukhopadhyay, Soumik Materials Science Combining transport and magnetization measurements, we discover the emergence of a tricritical point connecting the antiferromagnetic, metamagnetic and paramagnetic regions in MnBi$_2$Te$_4$, a magnetic topological insulator candidate which can potentially exhibit axion electrodynamics. We observe a unique magnetic field-driven phase diagram where the second-order antiferromagnetic to paramagnetic phase boundary bifurcates into two first-order lines at the tricritical point. The two first-order lines enclosing the metamagnetic phase eventually terminate at the quantum critical endpoints with the application of magnetic field. |
| title | Metamagnetic quantum criticality in the antiferromagnetic topological insulator MnBi$_2$Te$_4$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2502.08383 |