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Peculiar roles of spins in the thermal conductivity of pure and doped La2CuO4: Comparison with CuGeO3

Yoichi Ando, X. F. Sun, J. Takeya, Seiki Komiya

cond-mat.supr-conarXiv:cond-mat/0304569

Abstract

In-plane and out-of-plane thermal conductivities (κab and κc) are measured on single crystals of pure, 1%-hole-doped, and 1%-Zn-doped La2CuO4. The roles of magnons and the spin stripes in the heat transport in these samples are discussed. Comparison with the heat transport in CuGeO3, which shows similar κ(T) behavior as that of La2CuO4, gives us a lesson of how the heat transport can probe the difference in the spin ground state.

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