Phase diagram and symmetry breaking of SU(4) spin-orbital chain in a generalized external field

Details Phase diagram and symmetry breaking of SU(4) spin-orbital chain in a generalized external field Phase diagram and symmetry breaking of SU(4) spin-orbital chain in a generalized external field

2003-08-21

arxiv.org/abs/cond-mat/0308432v1

Phys. Rev. B 69, 144405 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Revtex4, 16 pages, 7 figures

Scientific paper

10.1103/PhysRevB.69.144405

The ground state phases of a one-dimensional SU(4) spin-orbital Hamiltonian in a generalized external field are studied on the basis of Bethe-ansatz solution. Introducing three Land\'e $g$ factors for spin, orbital and their products in the SU(4) Zeeman term, we discuss systematically the various symmetry breaking. The magnetization versus external field are obtained by solving 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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