Frustration-Induced Ferrimagnetism in Heisenberg Spin Chains

Details Frustration-Induced Ferrimagnetism in Heisenberg Spin Chains Frustration-Induced Ferrimagnetism in Heisenberg Spin Chains

2011-11-15

arxiv.org/abs/1111.3430v1

J. Phys. Soc. Jpn. 80 (2011) 125003

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 3 figures, accepted for publication in Journal of the Physical Society of Japan

Scientific paper

10.1143/JPSJ.80.125003

We study ground-state properties of the Heisenberg frustrated spin chain with interactions up to fourth nearest neighbors by the exact-diagonalization method and the density matrix renormalization group method. We find that ferrimagnetism is realized not only in the case of S=1/2 but also S=1 despite that there is only a single spin site in each unit cell determined from the shape of the Hamiltonian. Our numerical results suggest that a "multi-sublattice structure" is not required for the occurrence of ferrimagnetism in quantum spin systems with isotropic interactions.

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