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

Laverock, J.; Jovic, V.; Zakharov, A. A. LU ; Niu, Y. R. LU ; Kittiwatanakul, S.; Westhenry, B.; Lu, J. W.; Wolf, S. A. and Smith, K. E. (2018) In Physical Review Letters 121(25).
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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
121
issue
25
publisher
American Physical Society
external identifiers
  • scopus:85059160526
ISSN
0031-9007
DOI
10.1103/PhysRevLett.121.256403
language
English
LU publication?
yes
id
bf629ae8-4655-4ec7-b1f0-cb6f45d2e975
date added to LUP
2019-01-11 13:36:57
date last changed
2019-01-11 13:36:57
@article{bf629ae8-4655-4ec7-b1f0-cb6f45d2e975,
  abstract     = {<p>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.</p>},
  articleno    = {256403},
  author       = {Laverock, J. and Jovic, V. and Zakharov, A. A. and Niu, Y. R. and Kittiwatanakul, S. and Westhenry, B. and Lu, J. W. and Wolf, S. A. and Smith, K. E.},
  issn         = {0031-9007},
  language     = {eng},
  month        = {12},
  number       = {25},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Observation of Weakened V-V Dimers in the Monoclinic Metallic Phase of Strained VO2},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.121.256403},
  volume       = {121},
  year         = {2018},
}