Vortex dynamics and frustration in two-dimensional triangular chromium lattices

M. Hemmida, H. A. Krug Von Nidda, N. Büttgen, A. Loidl, L. K. Alexander, R. Nath, A. V. Mahajan, R. F. Berger, R. J. Cava, Yogesh Singh, D. C. Johnston

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Abstract

The spin dynamics of the two-dimensional (2D) triangular lattice antiferromagnets HCrO2, LiCrO2, and NaCrO2 is investigated by electron spin resonance. In these oxides, on approaching the Néel temperature TN from above, the divergence of the temperature dependent linewidth is well described in terms of a Berezinskii-Kosterlitz-Thouless scenario due to magnetic vortex-antivortex pairing. A refined analysis suggests analogies to the melting scenario of a 2D triangular lattice described by Nelson, Halperin, and Young.

Original languageEnglish (US)
Article number054406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number5
DOIs
StatePublished - Aug 12 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Hemmida, M., Krug Von Nidda, H. A., Büttgen, N., Loidl, A., Alexander, L. K., Nath, R., Mahajan, A. V., Berger, R. F., Cava, R. J., Singh, Y., & Johnston, D. C. (2009). Vortex dynamics and frustration in two-dimensional triangular chromium lattices. Physical Review B - Condensed Matter and Materials Physics, 80(5), [054406]. https://doi.org/10.1103/PhysRevB.80.054406