Nanoscale imaging of the electronic and structural transitions in vanadium dioxide

We investigate the electronic and structural changes at the nanoscale in vanadium dioxide (VO{sub 2}) 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 loc...

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Veröffentlicht in:Phys. Rev. B 2011-04, Vol.83 (16), Article 165108
Hauptverfasser: Qazilbash, M. M., Tripathi, A., Schafgans, A. A., Kim, Bong-Jun, Kim, Hyun-Tak, Cai, Zhonghou, Holt, M. V., Maser, J. M., Keilmann, F., Shpyrko, O. G., Basov, D. N.
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Sprache:eng
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Zusammenfassung:We investigate the electronic and structural changes at the nanoscale in vanadium dioxide (VO{sub 2}) 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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.83.165108