| Thermal conductivity in the doped two-leg ladder antiferromagnet Sr$_{14-x}$Ca$_{x}$Cu$_{24}$O$_{41}$ (2004) | |||||||||
Abstract | |||||||||
| Within the t-J model, the heat transport of the doped two-leg ladder material Sr$_{14-x}$Ca$_{x}$Cu$_{24}$O$_{41}$ is studied in the doped regime where superconductivity appears under pressure in low temperatures. The energy dependence of the thermal conductivity $\kappa_{c}(\omega)$ shows a low-energy peak, while the temperature dependence of the thermal conductivity $\kappa_{c}(T)$ is characterized by a broad band. In particular, $\kappa_{c}(T)$ increases monotonously with increasing temperature at low temperatures $T. Comment: 7 pages, 2 figures, added new references and discussions, accepted for publication in Phys. Lett. A | |||||||||
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