Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu2(Si1-xGex) 2O7 (x = 0.65)

H. Ohta, S. Okubo, D. Fukuoka, Y. Inagaki, T. Kunimoto, M. Kimata, K. Koyama, M. Motokawa, Z. Hiroi

研究成果: Contribution to journalConference article査読

2 被引用数 (Scopus)

抄録

We have performed the high-field ESR of the one-dimensional BaCu 2(Si1-xGex)2O7 (x = 0.65) antiferromagnet at 0.5 and 1.8 K in the wider frequency and magnetic field region (40-500 GHz, up to 30 T), and found the breather excitation predicted by the Oshikawa-Affleck (OA) theory. The observed field-induced gap for B||c (chain direction) shows the B2/3 dependence suggested by the OA theory, and the dependence is weak for the other directions which is consistent with the anisotropy of the Dzyaloshinsky-Moriya interaction. The results will be also discussed in connection with the breather excitation observed in Cu-benzoate.

本文言語英語
ページ(範囲)929-930
ページ数2
ジャーナルJournal of Magnetism and Magnetic Materials
272-276
DOI
出版ステータス出版済み - 5 2004
外部発表はい
イベントProceedings of the International Conference on Magnetism - Rome, イタリア
継続期間: 7 27 20038 1 2003

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Breather excitation observed by high-field ESR in one-dimensional antiferromagnet BaCu<sub>2</sub>(Si<sub>1-x</sub>Ge<sub>x</sub>) <sub>2</sub>O<sub>7</sub> (x = 0.65)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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