Twisted bilayer graphene provides a new two-dimensional platform for studying electron interaction phenomena and flat band properties such as correlated insulator transition, superconductivity and ferromagnetism at certain magic angles. Here, we present experimental characterization of interaction effects and superconductivity signatures in p-type twisted double-bilayer WSe₂. Enhanced interlayer interactions are observed when the twist angle decreases to a few degrees as reflected by the high-order satellites in the electron diffraction patterns taken from the reconstructed domains from a conventional moiré superlattice. In contrast to twisted bilayer graphene, there is no specific magic angle for twisted WSe₂. Flat band properties are observable at twist angles ranging from 1 to 4 degrees. Our work has facilitated future study in the area of flat band related properties in twisted transition metal dichalcogenide layered structures.

中文翻译：

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扭曲的双层双层WSe2中的相互作用效应和超导信号。

扭曲的双层石墨烯提供了一个新的二维平台，用于研究电子相互作用现象和平坦带特性，例如在某些魔术角处的相关绝缘体跃迁，超导性和铁磁性。在这里，我们目前在p型扭曲双层双层WSe _2中的相互作用效应和超导签名的实验表征。当扭曲角减小到几度时，可以观察到增强的层间相互作用，如高阶卫星在从常规莫尔超晶格的重构畴中获取的电子衍射图中所反映的。与扭曲的双层石墨烯相比，扭曲的WSe ₂没有特定的魔角。在1至4度的扭曲角度下可以观察到平坦带的特性。我们的工作促进了扭曲过渡金属二卤化双金属层状结构的平带相关性能领域的未来研究。