Superelastic metal-insulator phase transition in single-crystal VO2 nanobeams

W. Fan, S. Huang, J. Cao, E. Ertekin, C. Barrett, D. R. Khanal, J. C. Grossman, J. Wu

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated external-stress-induced metal-insulator phase transitions in cantilevered single-crystal VO2 nanobeams at variable temperatures using a combined theoretical and experimental approach. An atomic force microscope was used to measure the force-displacement curve of the nanobeams, which showed nonlinearity that signifies activation and expansion of domains of a new phase out of the old one. Superelasticity of the VO2 nanobeam and supersaturation of the phase transition were clearly observed and quantified within the general theory of first-order phase transitions. Phase field modeling was employed to understand the energetics of the domain formation.

Original languageEnglish (US)
Article number241105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number24
DOIs
StatePublished - Dec 11 2009
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Superelastic metal-insulator phase transition in single-crystal VO2 nanobeams'. Together they form a unique fingerprint.

Cite this