Open AccessФазовый переход металл-диэлектрик в тонких пленках диоксида ванадия, легированного никелем
Author(s) -
В.Н. Андреев,
В.А. Климов
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.10.48272.491
Subject(s) - condensed matter physics , materials science , atmospheric temperature range , thermal conduction , doping , metal , crystallite , electrical resistivity and conductivity , conductivity , thermodynamics , chemistry , physics , metallurgy , composite material , quantum mechanics
The electrical conductivity of thin polycrystalline VNi_ x O_2 films has been studied in a wide range of temperatures, which covers the regions of both metallic and insulator phase. It is shown that the metal–insulator phase transition temperature decreases as the nickel concentration increases, and the temperature range of coexistence of the phases increases monotonically. The temperature dependence of the conductivity of the insulating VNi_ x O_2 phase is explained using the hopping conduction model that takes into account the influence of thermal atomic vibrations on the resonance integral. Parameter ε has been calculated as a function of the doping level of VO_2.