期刊
APPLIED PHYSICS LETTERS
卷 118, 期 24, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0048884
关键词
-
资金
- EPSRC [EP/S019367/1, EP/V007033/1, EP/S030719/1, EP/N010345/1, e672]
- ERC Synergy Grant Hetero2D
- Lloyd's Register Foundation Nanotechnology Grant
- European Graphene Flagship Core 3 Project
- EU Quantum Technology Flagship Project 2D-SIPC
Twistronic assembly of 2D materials tunes the electronic and optical properties of van der Waals heterostructures, with different orientations of bilayers exhibiting contrasting behaviors regarding the band edge positions.
Twistronic assembly of 2D materials employs the twist angle between adjacent layers as a tuning parameter for designing the electronic and optical properties of van der Waals heterostructures. Here, we study how interlayer hybridization, weak ferroelectric charge transfer between layers, and a piezoelectric response to deformations set the valence and conduction band edges across the moire supercell in twistronic homobilayers of MoS2, MoSe2, WS2, and WSe2. We show that, due to the lack of inversion symmetry in the monolayer crystals, bilayers with parallel (P) and antiparallel (AP) unit cell orientations display contrasting behaviors. For P-bilayers at small twist angles, we find band edges in the middle of triangular domains of preferential stacking. In AP-bilayers at marginal twist angles (theta(AP) < 1 degrees), the band edges are located in small regions around the intersections of domain walls, giving highly localized quantum dot states. (C) 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据