Alternating-spin S=3/2 and sigma=1/2 Heisenberg chain with three-body exchange interactions

Abstract

The promotion of collinear classical spin configurations as well as the enhanced tendency towards nearest-neighbor clustering of the quantum spins are typical features of the frustrating isotropic three-body exchange interactions in Heisenberg spin systems. Based on numerical density-matrix renormalization group calculations, we demonstrate that these extra interactions in the Heisenberg chain constructed from alternating S=3/2 and sigma=1/2 site spins can generate numerous specific quantum spin states, including some partially-polarized ferrimagnetic states as well as a doubly-degenerate non-magnetic gapped phase. In the non-magnetic region of the phase diagram, the model describes a crossover between the spin-1 and spin-2 Haldane-type states.

arXiv comment6 pages, 7 figures

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Cited by in corpus (4)

• Magnetic signatures of quantum critical points of the ferrimagnetic mixed spin-(1/2, S) Heisenberg chains at finite temperatures
• Ferromagnetic phases due to competing short- and long-range interactions in the spin-S Blume-Capel model
• Magnetic properties of delta- and kagome-like chains with competing interactions
• Heisenberg spin chains with additional isotropic three-site exchange interactions