Exact dimer ground state of the two dimensional Heisenberg spin system SrCu_2(BO_3)_2

Preprint

1 April 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9807075

Abstract

The two dimensional Heisenberg model for SrCu_2(BO_3)_2 has the exact dimer ground state which was proven by Shastry and Sutherland almost twenty years ago. The critical value of the quantum phase transition from the dimer state to the N\'{e}el ordered state is determined. Analysis of the experimental data shows that SrCu_2(BO_3)_2 has the dimer ground state but is close to the transition point, which leads to the unusual temperature dependence of the susceptibility. Almost localized nature of the triplet excitations explains the plateaus observed in the magnetization curve.

Keywords

DIMENSIONAL HEISENBERG
DIMER GROUND STATE
EXACT DIMER GROUND
PHASE TRANSITION
HEISENBERG
SRCU_2
BO_3

All Related Versions

Version 1, 1998-07-06, ArXiv
Version 2, 1998-07-09, ArXiv
Version 3, 1998-07-22, ArXiv
Version 4, 1999-04-01, ArXiv
Published version: Physical Review Letters, 82 (18), 3701.

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