Phase diagram and symmetry breaking of an SU„4... spin-orbital chain in a generalized external field
نویسندگان
چکیده
The ground-state phases of a one-dimensional SU~4! spin-orbital Hamiltonian in a generalized external field are studied on the basis of the Bethe-ansatz solution. Introducing three Landé g factors for spin, orbital, and their products in the SU~4! Zeeman term, we systematically discuss various symmetry breakings. The magnetization versus external field is evaluated by solving the Bethe-ansatz equations numerically. The phase diagrams corresponding to distinct residual symmetries are given by means of both numerical and analytical methods.
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