Coherent, atomically thin transition-metal dichalcogenide superlattices with engineered strain
Abstract
Two-dimensional superlattices represent the atomic-thickness limit of heterostructures that enable technologies such as strain-engineered multiferroics and quantum-cascade lasers. Xie et al. were able to produce monolayer superlattices of transition metal dichalcogenides (WS 2 and WSe 2 ) with full lattice coherence, despite a 4% lattice mismatch. They used a modulated metal-organic chemical vapor deposition process that precisely controlled each precursor. Furthermore, the authors could strain-engineer the optical properties of the superlattices to observe out-of-plane rippling.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 09, 2018
- Source ID
- 10.1126/science.aao5360
Entities
People
- Chibeom Park
- David A. Muller
- Jiwoong Park
- Ka Un Lao
- Kibum Kang
- Lijie Tu
- Lujie Huang
- Preeti Poddar
- Robert A DiStasio
- Saien Xie
- Yimo Han
Organizations
- Air Force Office of Scientific Research
- Cornell University
- National Science Foundation
- United States Department of Energy
- University of Chicago