Theory Of The One Dimensional SU(4) Spin-Orbital Model

1999/03/02 by P. Azaria, Azaria, P., A. O. Gogolin +6
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/9903047

4 pages, 1 figure

arxiv created 1999/03/02 · openalex publication_date 1999/03/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The one-dimensional spin-orbital model is studied by means of Abelian bosonization. We derive the low-energy effective theory which enables us to study small deviations from the SU(4) symmetric point. We show that there exists a massless region with algebraically decaying correlation functions, ∼ cos(π/2a₀ x) x^-3/2. When entering the massive phase, the system displays an approximate SO(6) enlarged symmetry with a dimerization type of ordering consisting in alternating spin and orbital singlets.

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