Role of thermal heating on the voltage induced insulator-metal transition in VO2.
Phys Rev Lett
; 110(5): 056601, 2013 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-23414038
ABSTRACT
We show that the main mechanism for the dc voltage or dc current induced insulator-metal transition in vanadium dioxide VO(2) is due to local Joule heating and not a purely electronic effect. This "tour de force" experiment was accomplished by using the fluorescence spectra of rare-earth doped micron sized particles as local temperature sensors. As the insulator-metal transition is induced by a dc voltage or dc current, the local temperature reaches the transition temperature indicating that Joule heating plays a predominant role. This has critical implications for the understanding of the dc voltage or dc current induced insulator-metal transition and has a direct impact on applications which use dc voltage or dc current to externally drive the transition.
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MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article