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

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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, $\sim \cos(π/{2a_0} x) x^{-3/2}$. 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.
4 pages, 1 figure

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/29102

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9903047
 http://arxiv.org/abs/cond-mat/9903047

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arXiv