Experimental study of the electronic and lattice contributions to the VO2 transition

F. Pintchovski, W. S. Glaunsinger, A. Navrotsky

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The contributions of electronic and crystallographic components to the semiconductor → metal transition in VO2 have been estimated from resistivity, E.P.R., and calorimetric measurements of the electronic and thermodynamic properties of GaxV-xO2, where 0 < x < 0.0130. E.P.R. and resistivity measurements indicate a decrease in the metallic character of the high-temperature R phase with increasing x, and calorimetric measurements of the energetics of the transition show a decrease in the enthalpy and entropy of the transition with increasing levels of doping. This concomitant decrease in enthalpy and metallic character with increasing x implies a strong contribution of the electronic entropy to the transition. An extrapolation of the combined electronic and calorimetric data for GaxV -xO2 to pure VO2 suggest that the electronic entropy comprises about 60% of the total entropy of transition in VO2.

Original languageEnglish (US)
Pages (from-to)941-949
Number of pages9
JournalJournal of Physics and Chemistry of Solids
Volume39
Issue number9
DOIs
StatePublished - 1978

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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