One-Dimensional S=1 Spin-Orbital Model with Uniaxial Single-Ion Anisotropy

Details One-Dimensional S=1 Spin-Orbital Model with Uniaxial Single-Ion Anisotropy One-Dimensional S=1 Spin-Orbital Model with Uniaxial Single-Ion Anisotropy

2004-12-02

arxiv.org/abs/cond-mat/0412067v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 10 figures, accepted for publication in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.74.758

We investigate ground-state properties of a one-dimensional S=1 spin-orbital model with or without uniaxial single-ion anisotropy. By means of the density matrix renormalization group method, we compute the ground-state energy, the magnetization curves and the correlation functions. We discuss how the ground-state properties depend on the two exchange couplings for orbital and spin sectors. The phase diagram obtained is compared with that for the S=1/2 model. We also address the effect of uniaxial single-ion anisotropy.

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