Critical Behavior and Universal Signature of an Axion Insulator State

نویسندگان

چکیده

Recently, the search for an axion insulator state in ferromagnet-3D topological (TI) heterostructure and $\mathrm{MnBi_2Te_4}$ has attracted intensive interest. However, its detection remains difficult experiments. We systematically investigate disorder-induced phase transition of a 3D TI with antiparallel magnetization alignment surfaces. It is found that there exists 2D which shares same universality class quantum Hall plateau to transition. Then, we provide phenomenological theory maps random mass Dirac Hamiltonian into Chalker-Coddington network model. Therefore, propose probe by investigating universal signature such $\mathrm{MnBi_2Te_4}$. Our findings not only show global diagram state, but also new experimental routine it.

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ژورنال

عنوان ژورنال: Physical Review Letters

سال: 2021

ISSN: ['1079-7114', '0031-9007', '1092-0145']

DOI: https://doi.org/10.1103/physrevlett.126.156601