Combined analytical and numerical approach to magnetization plateaux in one-dimensional spin tube antiferromagnets

Details Combined analytical and numerical approach to magnetization plateaux in one-dimensional spin tube antiferromagnets Combined analytical and numerical approach to magnetization plateaux in one-dimensional spin tube antiferromagnets

2012-03-14

arxiv.org/abs/1203.3084v1

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages

Scientific paper

In this paper, we investigate the properties of frustrated three-leg spin tubes under a magnetic field. We concentrate on two kind of geometries for these tubes, one of which is relevant for the compound $\mathrm{[(CuCl_2tachH)_3Cl]Cl_2}$. We combine an analytical path integral approach with a strong coupling approach, as well as large-scale Density Matrix Renormalization Groups (DMRG) simulations, to identify the presence of plateaux in the magnetization curve as a function of the value of spin $S$. We also investigate the issue of gapless non-magnetic excitations on some plateaux, dubbed chirality degrees of freedom for both tubes.

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