Schwinger-boson calculation for a frustrated antiferromagnet

Details Schwinger-boson calculation for a frustrated antiferromagnet Schwinger-boson calculation for a frustrated antiferromagnet

2001-06-29

arxiv.org/abs/cond-mat/0106630v2

M. J. Quist, Phys. Rev. B 65, 024438 (2002)

Physics

Condensed Matter

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.65.024438

The application of the Schwinger-boson transformation to quantum Heisenberg magnets is briefly reviewed, beginning with the derivation of a rotationally invariant mean-field theory. The inclusion of Gaussian fluctuations is discussed in some detail for a general (non-Bravais) lattice, extending available results for simple lattices. Numerical results are presented for the ground-state energy of the Shastry-Sutherland model, and possible future refinements of the method are outlined.

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