论文标题
轴承绝缘子状态的批判行为和通用签名
Critical Behavior and Universal Signature of an Axion Insulator State
论文作者
论文摘要
最近，在Ferromagnet-3D拓扑绝缘子（TI）异质结构和$ \ MATHRM {MNBI_2TE_4} $中寻找轴线绝缘体状态已引起了强烈的兴趣。但是，在实验中其检测仍然很困难。我们系统地研究了具有反平行磁化比对表面的3D TI中轴突绝缘子状态的疾病诱导的相变。发现存在2D疾病诱导的相变，该过渡与量子大厅高原与高原过渡共享相同的普遍性类别。然后，我们提供了一种现象学理论，该理论将轴突绝缘子状态的随机质量dirac Hamiltonian映射到Chalker-Coddington网络模型中。因此，我们建议通过研究Ferromagnet-3D Ti异质结构中的这种相变的通用签名和$ \ MATHRM {MNBI_2TE_4} $来探测轴突绝缘子状态。我们的发现不仅显示了轴突绝缘子状态的全局相图，而且还提供了一个新的实验程序来探测它。
Recently, the search for an axion insulator state in the ferromagnet-3D topological insulator (TI) heterostructure and $\mathrm{MnBi_2Te_4}$ has attracted intensive interest. However, its detection remains difficult in experiments. We systematically investigate the disorder-induced phase transition of the axion insulator state in a 3D TI with antiparallel magnetization alignment surfaces. It is found that there exists a 2D disorder-induced phase transition which shares the same universality class with the quantum Hall plateau to plateau transition. Then, we provide a phenomenological theory which maps the random mass Dirac Hamiltonian of the axion insulator state into the Chalker-Coddington network model. Therefore, we propose to probe the axion insulator state by investigating the universal signature of such a phase transition in the ferromagnet-3D TI heterostructure and $\mathrm{MnBi_2Te_4}$. Our findings not only show a global phase diagram of the axion insulator state, but also provide a new experimental routine to probe it.
