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학술지 Nanoscale Imaging of the Electronic and Structural Transitions in Vanadium Dioxide
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저자
M. M. Qazilbash, A. Tripathi, A. A. Schafgans, 김봉준, 김현탁, Zhonghou Cai, M. V. Holt, J. M. Maser, F. Keilmann, O. G. Shpyrko, D. N. Basov
발행일
201104
출처
Physical Review B : Condensed Matter and Materials Physics, v.83 no.16, pp.1-7
ISSN
1098-0121
출판사
American Physical Society(APS)
DOI
https://dx.doi.org/10.1103/PhysRevB.83.165108
초록
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 제안 키워드
Infrared microscopy, Lattice structure, Phase coexistence, Phase transition, Structural changes, insulator-to-metal transition, nanoscale imaging, near-field, structural transition, vanadium dioxide, x-Ray diffraction