Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit

S. Chen (), L. Wang and Y. P. Wang

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 57, issue 3, 265-270

Abstract: We study the ground-state properties of frustrated Heisenberg ferrimagnetic ladders with antiferromagnetic exchange interactions and two types of alternating sublattice spins. In the limit of strong rung couplings, we show that the mixed spin-1/2 and spin-1 ladders can be systematically mapped onto a spin-1/2 Heisenberg model with additional next-nearest-neighbor exchanges. The system is either in a ferrimagnetic state or in a critical spin-liquid state depending on the competition between the spin exchanges along the legs and the diagonal exchanges. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 75.10.Jm Quantized spin models (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00180-9

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