Universal properties of highly frustrated quantum magnets in strong magnetic fields

Details Universal properties of highly frustrated quantum magnets in strong magnetic fields Universal properties of highly frustrated quantum magnets in strong magnetic fields

2006-12-12

arxiv.org/abs/cond-mat/0612281v2

Fizika Nizkikh Temperatur, 2007, v.33, No.9, p.982-996 [Low Temperature Physics -- September 2007 -- Volume 33, Issue 9, pp. 7

Physics

Condensed Matter

Strongly Correlated Electrons

Paper based on the invited talk given by J. Richter at the International Conference "Statistical Physics 2006. Condensed Matte

Scientific paper

10.1063/1.2780166

The purpose of the present paper is two-fold. On the one hand, we review some recent studies on the low-temperature strong-field thermodynamic properties of frustrated quantum spin antiferromagnets which admit the so-called localized-magnon eigenstates. One the other hand, we provide some complementary new results. We focus on the linear independence of the localized-magnon states, the estimation of their degeneracy with the help of auxiliary classical lattice-gas models and the analysis of the contribution of these states to thermodynamics.

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