Multi-Triplet Magnons in SrCu2(BO3)2Studied by Thermal Conductivity Measurements in Magnetic Fields

2004/09/30 by K. Kudo, Takashi Noji, T. Noji +6
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1143/jpsj.73.3497

published as Journal of the Physical Society of Japan Vol. 73, No. 12, p. 3497 (2004) · 7 pages, 2 figures

openalex publication_date 2004/12/15 · arxiv created 2004/12/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have measured the thermal conductivity parallel to the a-axis of the Zn-free and 1% Zn-substituted SrCu_2-xZn_x(BO₃)₂ in magnetic fields up to 14 T, in order to examine the thermal conductivity due to the multi-triplet magnons. It has been found that the thermal conductivity peak observed in the spin gap state is suppressed by the substitution of Zn for Cu in high magnetic fields above 6 T, while it is not changed in low magnetic fields below 6 T. The results suggest that the thermal conductivity peak in the spin-gap state of SrCu₂(BO₃)₂ is composed of not only thermal conductivity due to phonons but also that due to the multi-triplet magnons in high fields above 6 T.

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