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학술지 Current Oscillations in Vanadium Dioxide: Evidence for Electrically Triggered Percolation Avalanches
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저자
Tom Driscoll, Jack Quinn, Massimiliano Di Ventra, Dimitri N. Basov, 서기완, 이용욱, 김현탁, David R. Smith
발행일
201209
출처
Physical Review B : Condensed Matter and Materials Physics, v.86 no.9, pp.1-8
ISSN
1098-0121
출판사
American Physical Society(APS)
DOI
https://dx.doi.org/10.1103/PhysRevB.86.094203
협약과제
12ZF1100, Seed형 기술개발을 위한 창의형 연구사업, 박선희
초록
In this work, we experimentally and theoretically explore voltage-controlled oscillations occurring in microbeams of vanadium dioxide. These oscillations are a result of the reversible insulator-to-metal phase transition in vanadium dioxide. By examining the structure of the observed oscillations in detail, we propose a modified percolative-avalanche model which allows for voltage triggering. This model captures the periodicity and waveshape of the oscillations as well as several other key features. Importantly, our modeling shows that while temperature plays a critical role in the vanadium dioxide phase transition, electrically induced heating can not act as the primary instigator of the oscillations in this configuration. This realization leads us to identify the electric field as the most likely candidate for driving the phase transition. © 2012 American Physical Society.
KSP 제안 키워드
Controlled oscillations, Current oscillations, Key features, Metal phase, Phase transition, electric field, induced heating, vanadium dioxide, voltage controlled