Sapphire substrate-induced effects in VO2 thin films grown by oxygen plasma-assisted pulsed laser deposition
Abstract
We investigate the structural and electronic properties of VO2 thin films on c-plane sapphire substrates with three different surface morphologies to control the strain at the substrate-film interface. Only non-annealed substrates with no discernible surface features (terraces) provided a suitable template for VO2 film growth with a semiconductor-metal transition (SMT), which was much lower than the bulk transition temperature. In addition to strain, oxygen vacancy concentration also affects the properties of VO2, which can be controlled through deposition conditions. Oxygen plasma-assisted pulsed laser deposition allows favorable conditions for VO2 film growth with SMTs that can be easily tailored for device applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2015
- Source ID
- 10.1063/1.4935814
Entities
People
- A. K. Pradhan
- D. W. Scott
- J. R. Skuza
Organizations
- National Science Foundation
- Norfolk State University
- United States Department of Defense