Heat transport in SrCu_2(BO_3)_2 and CuGeO_3

Details Heat transport in SrCu_2(BO_3)_2 and CuGeO_3 Heat transport in SrCu_2(BO_3)_2 and CuGeO_3

2001-08-29

arxiv.org/abs/cond-mat/0108488v1

Physica B 312-313C, 597 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures; appears in the proceedings of the SCES2001 (Physica B)

Scientific paper

10.1016/S0921-4526(01)01185-1

In the low dimensional spin systems $SrCu_2(BO_3)_2$ and $CuGeO_3$ the thermal conductivities along different crystal directions show pronounced double-peak structures and strongly depend on magnetic fields. For $SrCu_2(BO_3)_2$ the experimental data can be described by a purely phononic heat current and resonant scattering of phonons by magnetic excitations. A similar effect seems to be important in $CuGeO_3$, too but, in addition, a magnetic contribution to the heat transport may be present.

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