Metal–Insulator Phase Transition in Iron-Doped Vanadium Dioxide Thin Films

Journal Article · Sat Dec 15 04:00:00 EST 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418120028· OSTI ID:22923136

Klimov, V. A. ^[1]

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1. Ioffe Institute, Russian Academy of Sciences (Russian Federation)

The electrical conductivity of polycrystalline V{sub (1 –} {sub x)}Fe{sub x}O{sub 2} films has been investigated in a wide temperature range, which covers both the metal and insulator phase regions. It is shown that with an increase in the iron concentration the metal–insulator phase transition shifts toward lower temperatures, while the temperature range of the transition in doped samples additionally broadens as compared with pure VO{sub 2}. To explain the temperature dependence of the electrical conductivity of the V{sub (1 –} {sub x)}Fe{sub x}O{sub 2} insulator phase, a hopping conductivity model has been used, which takes into account the effect of thermal vibrations of atoms on the resonance integral. The values of parameter ε have been calculated as a function of the degree of VO{sub 2} doping.

• OSTI ID: 22923136
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 12 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
CONCENTRATION RATIO
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
IRON
PHASE TRANSFORMATIONS
POLYCRYSTALS
RESONANCE INTEGRALS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
THIN FILMS
VANADIUM OXIDES
VIBRATIONAL STATES