SU(4) Theory for Spin Systems with Orbital Degeneracy

1998/04/15 by You‐Quan Li, Y. Q. Li, Michael Ma +4 · 17 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.81.3527

published as Phys. Rev. Lett. 80 (1998) 3527 · 11 pages, 2 figures. submitted to PRL

arxiv created 1998/04/15 · openalex publication_date 1998/10/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 LiNiO₂. In the SU(4) N'eel-ordered state, spin-spin correlations can be antiferromagnetic between two neighboring sites with parallel magnetic moments.

Citations

• Two soluble models of an antiferromagnetic chain

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