Partition function zeros and magnetization plateaus of the spin-1 Ising–Heisenberg diamond chain

V.V. Hovhannisyan, N.S. Ananikian and R. Kenna

Physica A: Statistical Mechanics and its Applications, 2016, vol. 453, issue C, 116-130

Abstract: We study the properties of the generalized spin-1 Ising–Heisenberg model on a diamond chain, which can be considered as a theoretical model for the homometallic magnetic complex [Ni3(C4H2O4)2−(μ3−OH)2(H2O)4]n⋅(2H2O)n. The model possesses a large variety of ground-state phases due to the presence of biquadratic and single-ion anisotropy parameters. Magnetization and quadrupole moment plateaus are observed at one- and two-thirds of the saturation value. The distributions of Yang–Lee and Fisher zeros are studied numerically for a variety of values of the model parameters. The usual value σ=−12 alongside an unusual value σ=−23 ​is determined for the Yang–Lee edge singularity exponents.

Keywords: Ising–Heisenberg spin model; Magnetization plateau; Diamond chain; Yang–Lee zeros; Fisher zeros (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:453:y:2016:i:c:p:116-130

DOI: 10.1016/j.physa.2016.02.047

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