Magnetic excitations in SrCu2O3: a Raman scattering study

Details Magnetic excitations in SrCu2O3: a Raman scattering study Magnetic excitations in SrCu2O3: a Raman scattering study

2008-01-08

arxiv.org/abs/0801.1303v1

Phys. Rev. B 67, 052403 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.67.052403

We investigated temperature dependent Raman spectra of the one-dimensional spin-ladder compound SrCu2O3. At low temperatures a two-magnon peak is identified at 3160+/-10 cm^(-1) and its temperature dependence analyzed in terms of a thermal expansion model. We find that the two-magnon peak position must include a cyclic ring exchange of J_cycl/J_perp=0.09-0.25 with a coupling constant along the rungs of J_perp approx. 1215 cm^(-1) (1750 K) in order to be consistent with other experiments and theoretical results.

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