TITLE

Electron injection assisted phase transition in a nano-Au-VO2 junction

AUTHOR(S)
Gang Xu; C.-M. Huang; Tazawa, Masato; Jin, Ping; D. M. Chen; L. Miao
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/11/2008, Vol. 93 Issue 6, p061911
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The semiconductor-metal transition of vanadium dioxide (VO2) thin films epitaxially grown on C-plane sapphire is studied by depositing Au nanoparticles onto the thermochromic films forming a metal-semiconductor contact, namely, a nano-Au-VO2 junction. It reveals that Au nanoparticles have a marked effect on the reduction in the phase transition temperature of VO2. A process of electron injection in which electrons flow from Au to VO2 due to the lower work function of the metal is believed to be the mechanism. The result may support the Mott–Hubbard phase transition model for VO2.
ACCESSION #
34000002

 

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