Evidence for magnons and solitons in the one-dimensional S = 1/2 antiferromagnet Yb4As3

M. Lang, M. Köppen, P. Gegenwart, T. Cichorek, P. Thalmeier, F. Steglich, A. Ochiai

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


By means of low-temperature measurements of the specific heat, C, and thermal expansion, α = 1-1∂l/∂T, the magnetic properties of the quasi-one-dimensional (quasi-1D), S = 1/2 Heisenberg antiferromagnet Yb4As3 were investigated. In finite magnetic fields distinct anomalies were found which are pronounced differently strongly in both quantities: (i) the in-T linear contribution dominating the low-T specific heat becomes reduced with field and (ii) a peak is induced at slightly higher temperatures. The latter feature being much more pronounced in α(T, B) is well described by the classical sine-Gordon (SG) soliton solution of a ID Heisenberg antiferromagnet with a weak easy-plane anisotropy.

Original languageEnglish
Pages (from-to)458-459
Number of pages2
JournalPhysica B: Condensed Matter
Publication statusPublished - 2000
Externally publishedYes
EventYamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Japan
Duration: 1999 Aug 241999 Aug 28


  • Specific heat
  • Spin chains
  • YbAs

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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