Deterministic noise in vanadium dioxide based structures

Abstract

As is known [1], approaching the region of instability of a homogeneous state in a system featuring the metal‐insulator phase transition may be accompanied by low-frequency fluctuations analogous to the turbulent flow oscillations in hydrodynamics, alternatively referred to as deterministic chaos. The extensive investigation of noise in the structures based on transition metal oxide films is explained both by the prospects of using the steep temperature dependence of the physical properties of these structures, as well as by the basic interest in the physics of such phase transitions. A large proportion of investigations devoted to the metal‐insulator phase transition in vanadium dioxide (VO 2 ) was concentrated on the switching effect, which provides information on the phenomenon of interest and determines the practical applications of this material [2]. Electric switching in VO 2 , related to the metal‐ insulator phase transition, was observed in single crystal samples [3], planar thin-film structures [4], sandwich structures of the V‐VO 2 ‐metal type [5], and in various other systems containing VO 2 layers [6, 7].