Haldane-gap chains in a magnetic field

Details Haldane-gap chains in a magnetic field Haldane-gap chains in a magnetic field

2004-10-19

arxiv.org/abs/cond-mat/0410487v1

JSTAT P12006, (2004).

Physics

Condensed Matter

Strongly Correlated Electrons

34 pages, 7 figures

Scientific paper

10.1088/1742-5468/2004/12/P12006

We consider quasi one dimensional spin-1 Heisenberg chains with crystal field anisotropy in a uniform magnetic field. We determine the dynamical structure factor in various limits and obtain a fairly complete qualitative picture of how it changes with the applied field. In particular, we discuss how the width of the higher energy single magnon modes depends on the field. We consider the effects of a weak interchain coupling. We discuss the relevance of our results for recent neutron scattering experiments on the quasi-1D Haldane-gap compound NDMAP.

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