The transition from an ordered antiferromagnet to a quantum disordered spin liquid in a solvable bilayer model

Details The transition from an ordered antiferromagnet to a quantum disordered spin liquid in a solvable bilayer model The transition from an ordered antiferromagnet to a quantum disordered spin liquid in a solvable bilayer model

1995-10-26

arxiv.org/abs/cond-mat/9510151v1

Europhys. Lett., Vol. 32, 747 (1995)

Physics

Condensed Matter

Europhys. Lett., in press. Figures available by mail

Scientific paper

10.1209/0295-5075/32/9/008

We present a spin-1/2 bilayer model for the quantum order-disorder transition which (i) can be solved by mean-field theory for bulk quantities, (ii) becomes critical at the transition, and (iii) allows to include intralayer frustration. We present numerical data (for systems with up to 240 sites) and analytical results for the critical coupling strength, ground-state energy, order parameter and for the gap. We show that the critical coupling decreases linearly with frustration.

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