Magnetic excitations in SrCu2O3: a Raman scattering study
A. G\"ossling, U. Kuhlmann, C. Thomsen, A. L\"offert, C. Gross, and W., Assmus
TL;DR
This study uses Raman scattering to analyze magnetic excitations in SrCu2O3, revealing a two-magnon peak and cyclic ring exchange effects, advancing understanding of its spin-ladder magnetic properties.
Contribution
It provides the first detailed temperature-dependent Raman spectra analysis of SrCu2O3, quantifying cyclic ring exchange interactions in this one-dimensional spin-ladder compound.
Findings
Identified a two-magnon peak at 3160 cm^(-1)
Estimated cyclic ring exchange ratio J_cycl/J_perp=0.09-0.25
Determined the rung coupling constant J_perp approx. 1215 cm^(-1)
Abstract
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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