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

Nedko B. Ivanov, Svetozara I. Petrova and Jürgen Schnack ()
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Nedko B. Ivanov: Bielefeld University
Svetozara I. Petrova: University of Applied Sciences
Jürgen Schnack: Bielefeld University

The European Physical Journal B: Condensed Matter and Complex Systems, 2016, vol. 89, issue 5, 1-6

Abstract: 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 σ = 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.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1140/epjb/e2016-70057-y

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