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Thermal conductivity of quasi-one-dimensional antiferromagnetic spin-chain materials

A. V. Rozhkov·A. L. Chernyshev
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Abstract

We study heat transport in quasi-one-dimensional spin-chain systems by considering the model of one-dimensional bosonic spin excitations interacting with three-dimensional phonons and impurities in the limit of weak spin-lattice coupling and fast spin excitations. A combined effect of the phonon and impurity scatterings yields the following spin-boson thermal conductivity behavior: kappa_s ~ T^2 at low, kappa_s ~ 1/T at intermediate, and kappa_s = const at higher temperatures. Our results agree well with the existing experimental data for Sr2CuO3. We predict an unusual dependence on the impurity concentration for a number of observables and propose further experiments.

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A. V. Rozhkov, A. L. Chernyshev. 2005-03-01. Thermal conductivity of quasi-one-dimensional antiferromagnetic spin-chain materials. https://doi.org/10.1103/physrevlett.94.087201

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