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Thermal Conductivity of the Spin Peierls Compound CuGeO_3

Yoichi Ando·J. Takeya·D. L. Sisson·S. G. Doettinger·I. Tanaka·R. S. Feigelson·A. Kapitulnik
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Abstract

The thermal conductivity of the Spin-Peierls (SP) compound CuGeO_3 was measured in magnetic fields up to 16 T. Above the SP transition, the heat transport due to spin excitations causes a peak at around 22 K, while below the transition the spin excitations rapidly diminish and the heat transport is dominated by phonons; however, the main scattering process of the phonons is with spin excitations, which demonstrates itself in an unusual peak in the thermal conductivity at about 5.5 K. This low-temperature peak is strongly suppressed with magnetic fields in excess of 12.5 T.

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Yoichi Ando, J. Takeya, D. L. Sisson, S. G. Doettinger, I. Tanaka, R. S. Feigelson, A. Kapitulnik. 1998-05-08. Thermal Conductivity of the Spin Peierls Compound CuGeO_3. https://doi.org/10.1103/physrevb.58.r2913

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