Vortex dynamics and frustration in two-dimensional triangular chromium lattices
| Title | Vortex dynamics and frustration in two-dimensional triangular chromium lattices |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Hemmida M, von Nidda HAK, Buttgen N, Loidl A, Alexander LK, Nath R, Mahajan AV, Berger RF, Cava RJ, Singh Y, Johnston DC |
| Journal Title | Physical Review B |
| Volume | 80 |
| Pages | 054406 |
| Date Published | 08/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000269638500043 |
| Keywords | antiferromagnetic materials, exchange integrals, frustration, heisenberg-antiferromagnet, hydrogen compounds, l, lithium compounds, magnetic-properties, neel temperature, paramagnetic resonance, phase-transitions, sodium compounds, spin dynamics, xy-model |
| 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 Neacuteel temperature T-N 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. |
| URL | <Go to ISI>://000269638500043 |
| DOI | 10.1103/Physrevb.80.054406 |
