Noise-driven signal transmission using nonlinearity of VO2 thin films

Kanki, Teruo; Hotta, Yasushi; Asakawa, Naoki; Kawai, Tomoji; Tanaka, Hidekazu
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p242108
Academic Journal
We demonstrated signal transmission using the nonlinearity of VO2 in the manner of stochastic resonance (SR). A correlated insulator state of VO2 changes nonlinearly to a metallic state when an applied bias voltage increases beyond a threshold. The transition of the states between insulator and metal is adaptable to the SR theory. In this study, the response to a weak pulse signal was optimized by a particular level of noise via SR. Numerical SR simulations suggests the existence of multiple threshold channels in the insulating state, spontaneously enhancing the reliability of signal transmission.


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