Phase transitions, crystal growth

Metal-dielectric phase transition in thin films of vanadium dioxide with an admixture of aluminum

V. N. Andreev, V. A. Klimov, M. E. Kompan

Ioffe Institute, St. Petersburg

Abstract: It was found that the introduction of aluminum impurities into vanadium dioxide with a lack of oxygen does not lead to the formation of a dielectric phase M2. In this case, doping is accompanied by a decrease in the temperature of the transition of the $R$-phase to the M1 phase and a decrease in the electrical conductivity jump accompanying this phase transition. To explain the temperature dependence of the electrical conductivity of the dielectric M1 phase, a hopping conduction model is applied that takes into account the influence of thermal vibrations of atoms on the resonant integral.

Keywords: phase transition, electrical conductivity, doping, polaron.

Received: 20.06.2025
Revised: 20.06.2025
Accepted: 23.06.2025

DOI: 10.61011/FTT.2025.06.60947.166-25

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