Antiferromagnetism in a doped spin-Peierls model: Classical and quantum behaviors
Centre de Recherches sur les Très Basses
CNRS, BP 166X, 38042 Grenoble Cedex, France
Published online: 15 July 2000
We address the problem of antiferromagnetism in a two-dimensional model of doped spin-Peierls system, at the classical and quantum levels. A Bethe-Peierls solution is derived for the classical model, with an ordering temperature proportional to the doping concentration. The quantum model is treated in a cluster renormalization group showing a finite randomness behavior and an antiferromagnetic susceptibility at low temperature.
PACS: 75.10.Jm – Quantized spin models / 75.50.Ee – Antiferromagnetics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000