Determination of the thermal conductivity of nanowires based on the metal-insulator transition of VO<sub>2</sub> - Tout INSP
Article Dans Une Revue Journal of Applied Physics Année : 2025

Determination of the thermal conductivity of nanowires based on the metal-insulator transition of VO2

Résumé

We develop the theoretical foundation to determine the thermal conductivity of a single nanowire by using the optical contrast of the metallic and insulating domains of a VO2 nanowire excited with either a temperature difference or a laser beam. Considering the temperature dependence of the VO2 thermal conductivity, the heat flux and the temperature profile along a VO2 nanowire are obtained and used to derive explicit expressions for the position of the metal/insulator domain interface as a function of the thermal excitation. This relation determines the variations of the metallic and insulating domains' lengths, which can be employed to retrieve the thermal conductivity of a single nanowire bonded to a VO2 one. Furthermore, the advantages and disadvantages of each thermal excitation are discussed along with the appearance of invariants driving the one-dimensional nonlinear heat conduction along VO2 nanowires.
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hal-04879639 , version 1 (10-01-2025)

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Jose Ordonez-Miranda, Laurent Belliard. Determination of the thermal conductivity of nanowires based on the metal-insulator transition of VO2. Journal of Applied Physics, 2025, 137 (2), pp.025105. ⟨10.1063/5.0250479⟩. ⟨hal-04879639⟩
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