Potential signature of a kosterlitz-thouless transition in [formula presented]

M. Heinrich, H. A. Krug von Nidda, A. Loidl, N. Rogado, R. J. Cava

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


ESR measurements are reported for the quasi-two-dimensional honeycomb antiferromagnet [Formula presented]. Planar anisotropic properties are confirmed by angular dependent investigations of resonance field and linewidth. The divergence of the temperature-dependent linewidth on approaching [Formula presented] from above is described in terms of the Kosterlitz-Thouless transition, the critical behavior close to long-range magnetic order, and the 2D Heisenberg antiferromagnet. We provide arguments that the Kosterlitz-Thouless scenario is compatible with the observed critical exponent and suggest [Formula presented] is a weakly anisotropic 2D Heisenberg antiferromagnet.

Original languageEnglish (US)
JournalPhysical review letters
Issue number13
StatePublished - 2003

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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