Moire potential impedes interlayer exciton diffusion in van der Waals heterostructures
- Authors
- Choi, Junho; Hsu, Wei-Ting; Lu, Li-Syuan; Sun, Liuyang; Cheng, Hui-Yu; Lee, Ming-Hao; Quan, Jiamin; Tran, Kha; Wang, Chun-Yuan; Staab, Matthew; Jones, Kayleigh; Taniguchi, Takashi; Watanabe, Kenji; Chu, Ming-Wen; Gwo, Shangjr; Kim, Suenne; Shih, Chih-Kang; Li, Xiaoqin; Chang, Wen-Hao
- Issue Date
- Sep-2020
- Publisher
- AMER ASSOC ADVANCEMENT SCIENCE
- Citation
- SCIENCE ADVANCES, v.6, no.39, pp 1 - 6
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCIENCE ADVANCES
- Volume
- 6
- Number
- 39
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/916
- DOI
- 10.1126/sciadv.aba8866
- ISSN
- 2375-2548
2375-2548
- Abstract
- The properties of van der Waals heterostructures are drastically altered by a tunable moire superlattice arising from periodically varying atomic alignment between the layers. Exciton diffusion represents an important channel of energy transport in transition metal dichalcogenides (TMDs). While early studies performed on TMD heterobilayers suggested that carriers and excitons exhibit long diffusion, a rich variety of scenarios can exist. In a moire crystal with a large supercell and deep potential, interlayer excitons may be completely localized. As the moire period reduces at a larger twist angle, excitons can tunnel between supercells and diffuse over a longer lifetime. The diffusion should be the longest in commensurate heterostructures where the moire superlattice is completely absent. Here, we experimentally demonstrate the rich phenomena of interlayer exciton diffusion in WSe2/MoSe2 heterostructures by comparing several samples prepared with chemical vapor deposition and mechanical stacking with accurately controlled twist angles.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF PHOTONICS AND NANOELECTRONICS > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/916)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.