Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5

T. Kawamata, Y. Miyajima, N. Takahashi, T. Noji, Y. Koike

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

本文言語English
ページ(範囲)1212-1214
ページ数3
ジャーナルJournal of Magnetism and Magnetic Materials
310
2 SUPPL. PART 2
DOI
出版ステータスPublished - 2007 3

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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