Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-12-02
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.
Kawakami Norio
Miyashita Satoshi
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