Thermal conductivity of pure and Zn-doped LiCu${}_{2}$O${}_{2}$ single crystals

Thermal conductivity of pure and Zn-doped LiCu $_{2}$ O $_{2}$ single crystals

X. G. Liu, X. M. Wang, W. P. Ke, W. Tao, X. Zhao, and X. F. Sun

Phys. Rev. B 83, 144408 – Published 13 April 2011

Abstract

We report a study of the low-temperature thermal conductivity ( $κ$ ) of pure and Zn-doped LiCu $_{2}$ O $_{2}$ single crystals. The $κ (T)$ of pure LiCu $_{2}$ O $_{2}$ single crystal shows a double-peak behavior, with two peaks located 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.

Received 7 December 2010

DOI:https://doi.org/10.1103/PhysRevB.83.144408

Authors & Affiliations

X. G. Liu¹, X. M. Wang¹, W. P. Ke¹, W. Tao¹, X. Zhao², and X. F. Sun^1,*

¹Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
²School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China

^*xfsun@ustc.edu.cn

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Vol. 83, Iss. 14 — 1 April 2011

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