Optical properties of vanadium dioxide grown on sapphire substrate with different orientations

M. Nazari, Y. Zhao, Y. Zhu, V. V. Kuryatkov, Z. Y. Fan, A. A. Bernussi, M. Holtz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report optical, structural, and electrical properties of VO2 on sapphire substrates with c-, m- and r- orientations with identical growth conditions. XRD data show that VO2 orientation depends on the substrate orientation. Based on temperature-dependent resistivity measurements, metal-insulator phase transition (MIT) temperature, TMIT, depends on the VO2 orientation due, primarily, to stress. The energy gap E g is observed to gradually red shift as temperature increases before collapsing to Eg ≈ O eV at temperatures below TMIT.

Original languageEnglish (US)
Title of host publicationTMS 2013 - 142nd Annual Meeting and Exhibition, Supplemental Proceedings
Subtitle of host publicationLinking Science and Technology for Global Solutions
Pages933-940
Number of pages8
StatePublished - 2013
Externally publishedYes
Event142nd Annual Meeting and Exhibition: Linking Science and Technology for Global Solutions, TMS 2013 - San Antonio, TX, United States
Duration: Mar 3 2013Mar 7 2013

Publication series

NameTMS Annual Meeting

Other

Other142nd Annual Meeting and Exhibition: Linking Science and Technology for Global Solutions, TMS 2013
CountryUnited States
CitySan Antonio, TX
Period3/3/133/7/13

Keywords

  • Energy gap
  • Metal-insulator phase transition (MIT)
  • Refractive index
  • Spectroscopic ellipsometry

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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