Structurally Restricted Phase Transitions in VO2(B) and Their Impact on Transport Properties

S. R. Popuri, A. Artemenko, R. Decourt, M. Josse, U. C. Chung, D. Michau, M. Maglione, A. Villesuzanne, M. Pollet

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Despite the relatively simple composition and numerous applications of layered VO2(B), several issues such as effect of electron correlations and the nature of its metal-insulator transition remain unresolved due to the low irreversible phase transition temperature. We have overcome this challenge by using spark plasma sintering and reporting its reliable electronic transport properties. All our transport, magnetic and thermal data, converge in favor of an interesting multiphase nature of VO2(B): low temperature phase (insulating and magnetically ordered), an intermediate temperature phase (insulating), and a high temperature phase (presumably metallic with strong electron correlations) coexist. The coexistence domain for these three phases is broad and extends over about 60 K around 235 K. The low temperature phase with spin singlets is always associated with, at least one another phase and becomes dominant below 200 K. The high temperature phase is present over the full temperature range and exists alone above room temperature. We believe that our results will give considerable insight into understand this complex VO2(B) material and widen up its future applications.

Original languageEnglish
Pages (from-to)25085-25092
Number of pages8
JournalJournal of Physical Chemistry C
Volume119
Issue number44
DOIs
Publication statusPublished - 5 Nov 2015

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

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    Popuri, S. R., Artemenko, A., Decourt, R., Josse, M., Chung, U. C., Michau, D., Maglione, M., Villesuzanne, A., & Pollet, M. (2015). Structurally Restricted Phase Transitions in VO2(B) and Their Impact on Transport Properties. Journal of Physical Chemistry C, 119(44), 25085-25092. https://doi.org/10.1021/acs.jpcc.5b07826