Finite size spectrum, magnon interactions and magnetization of S=1 Heisenberg spin chains

Details Finite size spectrum, magnon interactions and magnetization of S=1 Heisenberg spin chains Finite size spectrum, magnon interactions and magnetization of S=1 Heisenberg spin chains

1999-09-28

arxiv.org/abs/cond-mat/9909388v3

Phys. Rev. B 62, 3786 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

28 pages, 8 figures, made substantial improvements

Scientific paper

10.1103/PhysRevB.62.3786

We report our density matrix renormalization-group and analytical work on S=1 antiferromagnetic Heisenberg spin chains. We study the finite size behavior within the framework of the non-linear sigma model. We study the effect of magnon-magnon interactions on the finite size spectrum and on the magnetization curve close to the critical magnetic field, determine the magnon scattering length and compare it to the prediction from the non-linear $\sigma$ model.

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