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

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2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)929-930
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
DOIs
Publication statusPublished - May 1 2004
Externally publishedYes
EventProceedings of the International Conference on Magnetism - Rome, Italy
Duration: Jul 27 2003Aug 1 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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