TY - JOUR
T1 - Potential signature of a kosterlitz-thouless transition in [formula presented]
AU - Heinrich, M.
AU - Krug von Nidda, H. A.
AU - Loidl, A.
AU - Rogado, N.
AU - Cava, Robert Joseph
PY - 2003/1/1
Y1 - 2003/1/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.91.137601
DO - 10.1103/PhysRevLett.91.137601
M3 - Article
C2 - 14525336
AN - SCOPUS:85038274294
SN - 0031-9007
VL - 91
JO - Physical review letters
JF - Physical review letters
IS - 13
ER -