Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-08-21
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.
Gu Shi-Jian
Li You-Quan
Zhou Huan-Qiang
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