AI 中文总结
研究多层异质结构中多极激子，提出超莫尔效应可解决层间扭曲角失配问题，利用WS₂/WSe₂/WS₂堆栈展示了多能级杂化四极态，强调超莫尔效应关键作用，为探索复杂激子态提供新思路。
AI 中文摘要
异质双层中莫尔陷阱偶极层间激子为探索相互作用驱动的现象提供了丰富平台。将层数扩展到三层及以上会产生极具吸引力的多极激子，即垂直排列的相干激子的叠加态。但实验中层间无意的扭曲角失配会降低垂直库仑耦合的强度和均匀性。本文提出异质三层中的超莫尔效应可通过创建垂直排列原子对齐的周期性口袋来解决，这有助于形成被困在这些口袋中的四极激子。利用WS₂/WSe₂/WS₂堆栈，展示了顶部和底部莫尔界面多个受限能级之间的相互作用，创建了电场可调的多能级杂化亮（对称）和暗（反对称）四极态。我们的工作强调了超莫尔效应在四极激子中的关键作用，对精确角度对齐敏感度降低的发现将激发对多层异质结构中复杂激子态的探索。
英文摘要
Moiré-trapped dipolar interlayer exciton in heterobilayers offers a rich platform to explore interaction-driven phenomena. Extending the number of layers to three and beyond leads to highly intriguing multipolar exciton - a superposition state of vertically aligned phase-coherent excitons. However, in experiments, unintentional twist-angle mismatch among layers may degrade the strength and homogeneity of the vertical Coulomb coupling. Here we propose that the supermoiré effect in a heterotrilayer comes to the rescue by creating periodic pockets of vertically aligned atomic registries that facilitate the formation of quadrupolar excitons trapped in such pockets. Using WS$_2$/WSe$_2$/WS$_2$ stack, we show interaction between multiple confined levels of the top and bottom moiré interfaces, creating electric field tunable multi-level hybridized bright (symmetric) and dark (anti-symmetric) quadrupolar states. Our work underscores the critical role of supermoiré effect in quadrupolar excitons. The discovery of reduced sensitivity on precise angle-alignment will ignite exploration of complex excitonic states in multi-layered heterostructures.
CommentsAccepted in Nano Letters
Journal refNano Letters 2026
DOI：10.1021/acs.nanolett.6c03005
