Magnon-mediated thermal conductivity in the dimerized spin-gap compound BaCu2 V2 O8

C. S. Lue, C. N. Kuo, D. S. Tasi, Y. K. Kuo, Zhangzhen He, Mitsuru Itoh

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3 Citations (Scopus)

Abstract

We have measured the thermal conductivity (κ) of the quasi-one-dimensional spin-gap compound BaCu2 V2 O8 with heat flow parallel and perpendicular to the chain axis. Distinctive differences in the magnitude and temperature dependence between these directions have been observed. A weak but non-negligible contribution to κ along the chain has been identified, attributed to the magnon heat transport. An analysis using a simple kinetic approach has been employed to rationalize this contribution. We also estimated the temperature dependent mean-free path for the magnon scattering. The result implies that the magnon-phonon scattering is a major process for the magnon-assisted κ at intermediate temperatures.

Original languageEnglish
Article number012406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number1
DOIs
Publication statusPublished - 2008 Jul 16

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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