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 language | English |
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Article number | 256403 |
Number of pages | 7 |
Journal | Physical Review Letters |
Volume | 121 |
Issue number | 25 |
Early online date | 20 Dec 2018 |
DOIs | |
Publication status | Published - 21 Dec 2018 |
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Dive into the research topics of 'Observation of Weakened V—V Dimers in the Monoclinic Metallic Phase of Strained VO2'. Together they form a unique fingerprint.Datasets
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VO2 XAS-PEEM data
Laverock, J. (Creator), University of Bristol, 12 Jun 2018
DOI: 10.5523/bris.230svfjkbc4b824jiezcf4qe9n, http://data.bris.ac.uk/data/dataset/230svfjkbc4b824jiezcf4qe9n
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HPC (High Performance Computing) and HTC (High Throughput Computing) Facilities
Alam, S. R. (Manager), Eccleston, P. E. (Other), Williams, D. A. G. (Manager) & Atack, S. H. (Other)
Facility/equipment: Facility