Intrinsic electronic switching time in ultrathin epitaxial vanadium dioxide thin film
Abstract
This letter investigates the intrinsic electronic switching time associated with the insulator-to-metal phase transition in epitaxial single crystal vanadium dioxide (VO2) thin films using impedance spectroscopy and ac conductivity measurements. The existence of insulating and metallic phase coexistence, intrinsic to the epitaxial (001) oriented VO2 thin film grown on a (001) rutile TiO2 substrate, results in a finite capacitance being associated with the VO2 films in their insulating phase that limits the electronic switching speed. Insights into the switching characteristics and their correlation to the transport mechanism in the light of phase coexistence are obtained by performing a detailed scaling study on VO2 two-terminal devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 18, 2013
- Source ID
- 10.1063/1.4793537
Entities
People
- Ayan Kar
- Darrell G. Schlom
- Eugene Freeman
- Hanjong Paik
- Huichu Liu
- Nikhil Shukla
- Roman Engel-herbert
- S. S. N. Bhardwaja
- Suman Datta
Organizations
- Cornell University
- Office of Naval Research
- Pennsylvania State University