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Spin-1 chains in a staggered magnetic field

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 57, Issue: 14, Page: R8087-R8090
1998
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Article Description

Phase transitions of the spin-1 (Formula presented) chain with a single-ion anisotropy in a staggered magnetic field are studied. We obtain interesting phase diagrams consisting of ferromagnetic, partially ferromagnetic, (Formula presented) antiferromagnetic (AF) and large-(Formula presented) phases. By using the twist-boundary-condition method, a Gaussian critical line is found between the AF phase and the large-(Formula presented) phase. A multicritical point lies among the (Formula presented) AF and large-(Formula presented) phases. An Ashkin-Teller type of bifurcation does not appear. © 1998 The American Physical Society.

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