Multi-Triplet Magnons in SrCu$_2$(BO$_3$)$_2$ Studied by Thermal Conductivity Measurements in Magnetic Fields

K. Kudo; T. Noji; Y. Koike; T. Nishizaki; N. Kobayashi

doi:10.1143/JPSJ.73.3497

Multi-Triplet Magnons in SrCu$_2$(BO$_3$)$_2$ Studied by Thermal Conductivity Measurements in Magnetic Fields

Strongly Correlated Electrons 2007-05-23 v2 Superconductivity

Authors: K. Kudo , T. Noji , Y. Koike , T. Nishizaki , N. Kobayashi

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Abstract

We have measured the thermal conductivity parallel to the a-axis of the Zn-free and 1% Zn-substituted SrCu $_{2-x}$ Zn $_x$ (BO $_3$ ) $_2$ 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 SrCu $_2$ (BO $_3$ ) $_2$ 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.

Keywords

multi-triplet magnons thermal conductivity spin gap state SrCu2(BO3)2 magnetic fields

Cite

@article{arxiv.cond-mat/0409178,
  title  = {Multi-Triplet Magnons in SrCu$_2$(BO$_3$)$_2$ Studied by Thermal Conductivity Measurements in Magnetic Fields},
  author = {K. Kudo and T. Noji and Y. Koike and T. Nishizaki and N. Kobayashi},
  journal= {arXiv preprint arXiv:cond-mat/0409178},
  year   = {2007}
}

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7 pages, 2 figures

Multi-Triplet Magnons in SrCu$_2$(BO$_3$)$_2$ Studied by Thermal Conductivity Measurements in Magnetic Fields

Abstract

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