Observation of Weakened V-V Dimers in the Monoclinic Metallic Phase of Strained VO2

Research output: Contribution to journalArticle

Abstract

Emergent order at mesoscopic length scales in condensed matter can provide fundamental insight into the underlying competing interactions and their relationship with the order parameter. Using spectromicroscopy, we show that mesoscopic stripe order near the metal-insulator transition (MIT) of strained VO2 represents periodic modulations in both crystal symmetry and V - V dimerization. Above the MIT, we unexpectedly find the long-range order of V - V dimer strength and crystal symmetry become dissociated beyond ≈200 nm, whereas the conductivity transition proceeds homogeneously in a narrow temperature range.

Details

Authors
  • J. Laverock
  • V. Jovic
  • A. A. Zakharov
  • Y. R. Niu
  • S. Kittiwatanakul
  • B. Westhenry
  • J. W. Lu
  • S. A. Wolf
  • K. E. Smith
Organisations
External organisations
  • University of Bristol
  • Boston University
  • University of Auckland
  • University of Virginia
  • Chulalongkorn University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
Original languageEnglish
Article number256403
JournalPhysical Review Letters
Volume121
Issue number25
Publication statusPublished - 2018 Dec 20
Publication categoryResearch
Peer-reviewedYes