莫尔莫特相关马赛克在扭折双层1T-TaS₂中
Moiré Mott correlated mosaics in twisted bilayer 1T-TaS$_2$
AI总结：
研究通过扭折双层1T-TaS₂的堆叠依赖性绝缘间隙，揭示了莫尔图案诱导的马赛克超晶格，具有局部磁矩和非磁性绝缘区域的竞争。
摘要：
范德华材料的可调性和扭折工程使单层1T-TaS₂展现出新的电子态。单层1T-TaS₂是一种已知的莫特绝缘体，其星形大卫电荷密度波重构形成局部磁矩的三角晶格。有趣的是，在其本体形式中，绝缘间隙不是由关联驱动，而是源于层间耦合。在此，我们利用绝缘间隙的堆叠依赖性，证明在扭折1T-TaS₂双层中，许多体间隙与单粒子间隙的空间竞争形成了莫特-平凡的马赛克超晶格，具有局部磁矩和非磁性绝缘区域。我们进一步展示了通过层间偏置调节马赛克相关态的可调性，产生可控的电荷转移和相关性的淬灭。我们的结果确立了扭折1T-TaS₂作为工程混合空间调制相关绝缘相的灵活平台，源于莫尔轮廓。
英文摘要：
The tunability and twist engineering of van der Waals materials enable the emergence of electronic states not present in individual monolayers. Among them, monolayer 1T-TaS$_2$ is a well-known Mott insulating system, whose star-of-David charge density wave reconstruction realizes an emergent triangular lattice of local magnetic moments. Interestingly, in its bulk form, the insulating gap is not correlation-driven, but stems from interlayer coupling. Here, we exploit the stacking-dependent nature of the insulating gap to show that in twisted 1T-TaS$_2$ bilayers, the spatially dependent competition between many-body and single-particle gaps creates Mott-trivial mosaic superlattices, featuring regions with local magnetic moments and non-magnetic insulating regions. We further demonstrate the tunability of the mosaic correlated state with an interlayer bias, giving rise to controllable charge transfer and quenching of correlations. Our results establish twisted 1T-TaS$_2$ as a flexible platform to engineer mixed spatially modulated correlated insulating phases, arising from the moiré profile.
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