Excitons and emergent quantum phenomena in stacked 2D semiconductors

超晶格 激子 半导体 堆积 范德瓦尔斯力 纳米技术 自旋(空气动力学) 物理 材料科学 工程物理 凝聚态物理 光电子学 量子力学 分子 核磁共振 热力学
作者
Nathan P. Wilson,Wang Yao,Jie Shan,Xiaodong Xu
出处
期刊:Nature [Nature Portfolio]
卷期号:599 (7885): 383-392 被引量:246
标识
DOI:10.1038/s41586-021-03979-1
摘要

The design and control of material interfaces is a foundational approach to realize technologically useful effects and engineer material properties. This is especially true for two-dimensional (2D) materials, where van der Waals stacking allows disparate materials to be freely stacked together to form highly customizable interfaces. This has underpinned a recent wave of discoveries based on excitons in stacked double layers of transition metal dichalcogenides (TMDs), the archetypal family of 2D semiconductors. In such double-layer structures, the elegant interplay of charge, spin and moire superlattice structure with many-body effects gives rise to diverse excitonic phenomena and correlated physics. Here we review some of the recent discoveries that highlight the versatility of TMD double layers to explore quantum optics and many-body effects. We identify outstanding challenges in the field and present a roadmap for unlocking the full potential of excitonic physics in TMD double layers and beyond, such as incorporating newly discovered ferroelectric and magnetic materials to engineer symmetries and add a new level of control to these remarkable engineered materials. This Review discusses the exciton physics of transition metal dichalcogenides, focusing on moire patterns and exciton many-body physics, and outlines future research directions in the field.
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