The Three-Magnon Contribution to the Spin Correlation Function in Integer-Spin Antiferromagnetic Chains

Details The Three-Magnon Contribution to the Spin Correlation Function in Integer-Spin Antiferromagnetic Chains The Three-Magnon Contribution to the Spin Correlation Function in Integer-Spin Antiferromagnetic Chains

1999-07-27

arxiv.org/abs/cond-mat/9907431v1

Physics

Condensed Matter

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.60.11891

The exact form factor for the O(3) non-linear sigma model is used to predict
the three-magnon contribution to the spin correlation function, S(q,w), near
wavevector q=pi in an integer spin, one-dimensional antiferromagnet. The
three-magnon contribution is extrememly broad and extremely weak; the
integrated intensity is <2% of the single-magnon contribution.

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