Thermal Conductivity of the Two-Dimensional Spin-Gap System SrCu2(BO3)2 in Magnetic Fields

Kazutaka Kudo; Takashi Noji; Yoji Koike; Terukazu Nishizaki; Norio Kobayashi

doi:10.1143/JPSJ.70.1448

Thermal Conductivity of the Two-Dimensional Spin-Gap System SrCu₂(BO₃)₂ in Magnetic Fields

Kazutaka Kudo, Takashi Noji, Yoji Koike, Terukazu Nishizaki, Norio Kobayashi

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

We have measured the thermal conductivity of the two-dimensional spin-gap system SrCu₂(BO₃)₂ single crystal in magnetic fields up to 14T. In zero field, both the in-plane and out-of-plane thermal conductivities exhibit anomalous enhancement at low temperatures below ∼ 11K. The enhancement is suppressed with increasing magnetic field. The enhancement in zero field is attributed to the increase of the thermal conductivity due to phonons, which is caused by the suppression of the phonon-magnon scattering owing to the spin-gap formation. The suppression of the enhancement by the application of magnetic field is explained by the reduction of the spin gap.

Original language	English
Pages (from-to)	1448-1451
Number of pages	4
Journal	journal of the physical society of japan
Volume	70
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.70.1448
Publication status	Published - Jun 1 2001
Externally published	Yes

Keywords

Phonon-magnon scattering
SrCu(BO)
Thermal conductivity
Two-dimensional spin gap system

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "We have measured the thermal conductivity of the two-dimensional spin-gap system SrCu2(BO3)2 single crystal in magnetic fields up to 14T. In zero field, both the in-plane and out-of-plane thermal conductivities exhibit anomalous enhancement at low temperatures below ∼ 11K. The enhancement is suppressed with increasing magnetic field. The enhancement in zero field is attributed to the increase of the thermal conductivity due to phonons, which is caused by the suppression of the phonon-magnon scattering owing to the spin-gap formation. The suppression of the enhancement by the application of magnetic field is explained by the reduction of the spin gap.",

keywords = "Phonon-magnon scattering, SrCu(BO), Thermal conductivity, Two-dimensional spin gap system",

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AU - Kudo, Kazutaka

AU - Noji, Takashi

AU - Koike, Yoji

AU - Nishizaki, Terukazu

AU - Kobayashi, Norio

PY - 2001/6/1

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N2 - We have measured the thermal conductivity of the two-dimensional spin-gap system SrCu2(BO3)2 single crystal in magnetic fields up to 14T. In zero field, both the in-plane and out-of-plane thermal conductivities exhibit anomalous enhancement at low temperatures below ∼ 11K. The enhancement is suppressed with increasing magnetic field. The enhancement in zero field is attributed to the increase of the thermal conductivity due to phonons, which is caused by the suppression of the phonon-magnon scattering owing to the spin-gap formation. The suppression of the enhancement by the application of magnetic field is explained by the reduction of the spin gap.

AB - We have measured the thermal conductivity of the two-dimensional spin-gap system SrCu2(BO3)2 single crystal in magnetic fields up to 14T. In zero field, both the in-plane and out-of-plane thermal conductivities exhibit anomalous enhancement at low temperatures below ∼ 11K. The enhancement is suppressed with increasing magnetic field. The enhancement in zero field is attributed to the increase of the thermal conductivity due to phonons, which is caused by the suppression of the phonon-magnon scattering owing to the spin-gap formation. The suppression of the enhancement by the application of magnetic field is explained by the reduction of the spin gap.

KW - Phonon-magnon scattering

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KW - Two-dimensional spin gap system

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