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Anomalous transition magnetic moments in two-dimensional Dirac materials
Physical Review B ( IF 3.7 ) Pub Date : 
Sanghita Sengupta, Madalina I. Furis, Oleg P. Sushkov, Valeri N. Kotov

We show that the magnetic response of atomically thin materials with Dirac spectrum and spin-orbit interactions can exhibit strong dependence on electron-electron interactions. While graphene itself has a very small spin-orbit coupling, various two-dimensional (2D) compounds “beyond graphene’’ are good candidates to exhibit the strong interplay between spin-orbit and Coulomb interactions. Materials in this class include dichalcogenides (such as MoS2 and WSe2), silicene, germanene, as well as 2D topological insulators described by the Kane-Mele model. We present a unified theory for their in-plane magnetic field response leading to”anomalous’’, i.e. electron interaction dependent transition moments. Our predictions can be potentially used to construct unique magnetic probes with high sensitivity to electron correlations.

中文翻译:

二维Dirac材料中的异常跃迁磁矩

我们表明,具有狄拉克谱和自旋轨道相互作用的原子薄材料的磁响应可以表现出对电子-电子相互作用的强烈依赖性。尽管石墨烯本身具有很小的自旋轨道耦合,但是“石墨烯之外”的各种二维(2D)化合物都是很好的候选物,可展现自旋轨道和库仑相互作用之间的强相互作用。此类材料包括二氢杀菌剂(例如MoS2 和WSe2),硅烯,锗烯以及由Kane-Mele模型描述的2D拓扑绝缘体。我们针对其导致“异常”(即电子相互作用相关的跃迁矩)的面内磁场响应提出了统一的理论。我们的预测可以潜在地用于构建对电子相关性高度敏感的独特磁探针。
更新日期:2020-07-03
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