SU(4) Theory for Spin Systems with Orbital Degeneracy

19 October 1998

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 81 (16) , 3527-3530
https://doi.org/10.1103/physrevlett.81.3527

Abstract

The isotropic limit of spin systems with orbital degeneracy has global SU(4) symmetry. On many 2D lattices, the ground state does not possess long-range order, which may explain the observed spin liquid properties of

{LiNiO}_{2}

. In the SU(4) Néel-ordered state, spin-spin correlations can be antiferromagnetic between two neighboring sites with parallel magnetic moments.

Keywords

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Version 1, 1998-04-15, ArXiv

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