Quasi-particle Density in Sr2RuO4 Probed by means of the Phonon Thermal Conductivity

Details Quasi-particle Density in Sr2RuO4 Probed by means of the Phonon Thermal Conductivity Quasi-particle Density in Sr2RuO4 Probed by means of the Phonon Thermal Conductivity

2001-04-25

arxiv.org/abs/cond-mat/0104493v2

J. Phys.: Condens. Matter vol. 14 page 7371-7381 (2002)

Physics

Condensed Matter

Superconductivity

14 pages, 6 eps figures, Latex. This article corresponds to the reference 25 of Phys. Rev. Lett. vol.86 page2649-2652 (2001) a

Scientific paper

10.1088/0953-8984/14/31/308

The thermal conductivity of Sr2RuO4 along the least conducting direction perpendicular to the RuO2 plane has been studied down to 0.3 K. In this configuration the phonons remain the dominant heat carriers down to the lowest temperature, and their conductivity in the normal state is determined by the scattering on conduction electrons. We show that the phonon mean free path in the superconducting state is sensitive to the density of the quasi-particles in the bulk. An unusual magnetic field dependence of the phonon thermal conductivity is ascribed to the anisotropic superconducting gap structure in Sr2RuO4.

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