Plaquette Ordering in SU(4) Antiferromagnets

Details Plaquette Ordering in SU(4) Antiferromagnets Plaquette Ordering in SU(4) Antiferromagnets

2002-02-07

arxiv.org/abs/cond-mat/0202132v1

Phys. Rev. B 65, 214411 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages, 5 figures

Scientific paper

10.1103/PhysRevB.65.214411

We use fermion mean field theory to study possible plaquette ordering in the
antiferromagnetic SU(4) Heisenberg model. We find the ground state for both the
square and triangular lattices to be the disconnected plaquette state. Our mean
field theory gives a first order transition for plaquette ordering for the
triangular lattice. Our results suggest a large number of low lying states.

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