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arXiv · 1102.2788

Thermal conductivity of pure and Zn-doped LiCu_2O_2 single crystals

X. G. Liu·X. M. Wang·W. P. Ke·W. Tao·X. Zhao·X. F. Sun
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Abstract

We report a study of the low-temperature thermal conductivity (κ) of pure and Zn-doped LiCu_2O_2 single crystals. The κ(T) of pure LiCu_2O_2 single crystal shows a double-peak behavior, with two peaks locating at 48 K and 14 K, respectively. The different dependences of the peaks on the Zn concentration indicate that the high-T peak is likely due to the phonon transport while the low-T one is attributed to the magnon transport in the spin spiral ordering state. In addition, the magnetic field can gradually suppress the low-T peak but does not affect the high-T one; this further confirms that the low-T peak is originated from the magnon heat transport.

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X. G. Liu, X. M. Wang, W. P. Ke, W. Tao, X. Zhao, X. F. Sun. 2011-02-14. Thermal conductivity of pure and Zn-doped LiCu_2O_2 single crystals. https://doi.org/10.1103/physrevb.83.144408

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