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Large magneto-thermal effect and the spin-phonon coupling in a parent insulating cuprate Pr_{1.3}La_{0.7}CuO_4

X. F. Sun·I. Tsukada·T. Suzuki·Seiki Komiya·Yoichi Ando
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Abstract

The magnetic-field (H) dependence of the thermal conductivity κof Pr_{1.3}La_{0.7}CuO_4 is found to show a pronounced minimum for in-plane fields at low temperature, which is best attributed to the scattering of phonons by free spins that are seen by a Schottky-type specific heat and a Curie-Weiss susceptibility. Besides pointing to a strong spin-phonon coupling in cuprates, the present result demonstrates that the H-dependence of the phonon heat transport should not be naively neglected when discussing the κ(H) behavior of cuprates, since the Schottky anomaly is ubiquitously found in cuprates at any doping.

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X. F. Sun, I. Tsukada, T. Suzuki, Seiki Komiya, Yoichi Ando. 2005-07-27. Large magneto-thermal effect and the spin-phonon coupling in a parent insulating cuprate Pr_{1.3}La_{0.7}CuO_4. https://doi.org/10.1103/physrevb.72.104501

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