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

Jude Laverock, Vedran Jovic, A. Zakharov, Y. Niu, S. Kittiwatanakul, Benedict Westhenry, Jiwei Liu, Stuart A. Wolf, Kevin E. Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)
252 Downloads (Pure)

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.

Original languageEnglish
Article number256403
Number of pages7
JournalPhysical Review Letters
Volume121
Issue number25
Early online date20 Dec 2018
DOIs
Publication statusPublished - 21 Dec 2018

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