Opto-twistronic Hall effect in a three-dimensional spiral lattice

• 成果类型: Article
• 署名作者: Ji, Zhurun; Zhao, Yuzhou; Chen, Yicong; Zhu, Ziyan; Wang, Yuhui; Liu, Wenjing; Modi, Gaurav; Mele, Eugene J.; Jin, Song; Agarwal, Ritesh
• 署名单位: University of Pennsylvania; University of Pennsylvania; Stanford University; United States Department of Energy (DOE); SLAC National Accelerator Laboratory; University of Wisconsin System; University of Wisconsin Madison; Stanford University; Peking University; Peking University
• 刊物名称: Nature
• ISSN/ISSBN: 0028-5999
• DOI: 10.1038/s41586-024-07949-1
• 发表日期: 2024-10-03
• 页码: 69-+
• 关键词: moire; polaritons; stacking

摘要

Studies of moire systems have explained the effect of superlattice modulations on their properties, demonstrating new correlated phases(1). However, most experimental studies have focused on a few layers in two-dimensional systems. Extending twistronics to three dimensions, in which the twist extends into the third dimension, remains underexplored because of the challenges associated with the manual stacking of layers. Here we study three-dimensional twistronics using a self-assembled twisted spiral superlattice of multilayered WS2. Our findings show an opto-twistronic Hall effect driven by structural chirality and coherence length, modulated by the moire potential of the spiral superlattice. This is an experimental manifestation of the noncommutative geometry of the system. We observe enhanced light-matter interactions and an altered dependence of the Hall coefficient on photon momentum. Our model suggests contributions from higher-order quantum geometric quantities to this observation, providing opportunities for designing quantum-materials-based optoelectronic lattices with large nonlinearities.