Thermal Conductivity of the Spin Peierls Compound CuGeO_3

Details Thermal Conductivity of the Spin Peierls Compound CuGeO_3 Thermal Conductivity of the Spin Peierls Compound CuGeO_3

1998-05-08

arxiv.org/abs/cond-mat/9805099v1

Phys. Rev. B 58, R2913 - R2916 (1998).

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, including 2 postscript figures

Scientific paper

10.1103/PhysRevB.58.R2913

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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