Thermal conductivity of pure and Zn-doped LiCu_2O_2 single crystals

Details Thermal conductivity of pure and Zn-doped LiCu_2O_2 single crystals Thermal conductivity of pure and Zn-doped LiCu_2O_2 single crystals

2011-02-14

arxiv.org/abs/1102.2788v1

Phys. Rev. B 83, 144408 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.83.144408

We report a study of the low-temperature thermal conductivity (\kappa) of pure and Zn-doped LiCu_2O_2 single crystals. The \kappa(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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