Thermal conductivity of quasi-one-dimensional antiferromagnetic spin-chain materials |
| |
Authors: | Rozhkov A V Chernyshev A L |
| |
Institution: | Department of Physics, University of California-Irvine, Irvine, CA 92697, USA. |
| |
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) proportional to T2 at low, kappa(s) proportional to T-1 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|