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Nanoscale Imaging of the Electronic and Structural Transitions in Vanadium Dioxide
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- Authors
- M. M. Qazilbash, A. Tripathi, A. A. Schafgans, Bong-Jun Kim, Hyun-Tak Kim, Zhonghou Cai, M. V. Holt, J. M. Maser, F. Keilmann, O. G. Shpyrko, D. N. Basov
- Issue Date
- 2011-04
- Citation
- Physical Review B : Condensed Matter and Materials Physics, v.83, no.16, pp.1-7
- ISSN
- 1098-0121
- Publisher
- American Physical Society(APS)
- Language
- English
- Type
- Journal Article
- Abstract
- We investigate the electronic and structural changes at the nanoscale in vanadium dioxide (VO2) in the vicinity of its thermally driven phase transition. Both electronic and structural changes exhibit phase coexistence leading to percolation. In addition, we observe a dichotomy between the local electronic and structural transitions. Nanoscale x-ray diffraction reveals local, nonmonotonic switching of the lattice structure, a phenomenon that is not seen in the electronic insulator-to-metal transition mapped by near-field infrared microscopy. © 2011 American Physical Society.
- KSP Keywords
- Infrared microscopy, Lattice structure, Near-field, Phase coexistence, Phase transition, Structural changes, Vanadium Dioxide, X-ray Diffraction, insulator-to-metal transition, nanoscale imaging, structural transition