Ballistic magnetic thermal transport coupled to phonons

Ballistic magnetic thermal transport coupled to phonons

Motivated by thermal conductivity experiments in spin chain compounds, we propose a phenomenological model to account for a ballistic magnetic transport coupled to a diffusive phononic one, along the line of the seminal two-temperature diffusive transport Sanders-Walton model. Although the expressio...

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Veröffentlicht in:arXiv.org 2021-02
Hauptverfasser: Zavitsanos, P, Zotos, X
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Heat conductivity
Heat transfer
Physics - Other Condensed Matter
Physics - Statistical Mechanics
Thermal conductivity
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description Motivated by thermal conductivity experiments in spin chain compounds, we propose a phenomenological model to account for a ballistic magnetic transport coupled to a diffusive phononic one, along the line of the seminal two-temperature diffusive transport Sanders-Walton model. Although the expression for the effective thermal conductivity is identical to that of Sanders-Walton, the interpretation is entirely different, as the "magnetic conductivity" is replaced by an "effective transfer conductivity" between the magnetic and phononic component. This model also reveals the fascinating possibility of visualizing the ballistic character of magnetic transport, for appropriately chosen material parameters, as a two peak counter-propagating feature in the phononic temperature. It is also appropriate for the analysis of any thermal transport experiment involving a diffusive component coupled to a ballistic one.
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subjects Heat conductivity
Heat transfer
Physics - Other Condensed Matter
Physics - Statistical Mechanics
Thermal conductivity
title Ballistic magnetic thermal transport coupled to phonons
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