Twisted van der Waals materials have become a paradigmatic platform to realize exotic correlated states of matter. Here, we show that a twisted dichalcogenide bilayer (WSe 2 ) encapsulated between a magnetic van der Waals material (CrBr 3 ) features flat bands with tunable valley and spin flavors. We demonstrate that, when electron–electron interactions are included, spin-ferromagnetic and valley-ferromagnetic states emerge in the flat bands, stemming from the interplay between correlations, intrinsic spin–orbit coupling (SOC) and exchange proximity effects. We show that the specific symmetry broken state is controlled by the relative alignment of the magnetization of the encapsulation, demonstrating the emergence of correlated states controlled by exchange bias. Our results put forward a new van der Waals heterostructure where symmetry broken states emerge from a genuine interplay between twist engineering, SOC and exchange proximity, providing a powerful star...

中文翻译：

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磁性封装的扭转范德华二卤碳二化物中交换偏倚控制的相关性

扭曲的范德华材料已经成为实现异质相关物质状态的范例平台。在这里，我们显示了包裹在磁性范德华力材料（CrBr 3）之间的扭曲的二硫双氰化物双层（WSe 2）具有平坦的带，具有可调节的谷和自旋风味。我们证明，当包括电子-电子相互作用时，由于相关性，固有自旋-轨道耦合（SOC）和交换邻近效应之间的相互作用，自旋铁磁态和谷铁磁态出现在平坦带中。我们表明，特定的对称破坏状态是受封装磁化强度的相对对准控制的，这表明了受交换偏压控制的相关状态的出现。