Tuning the spin dynamics of kagome systems

Details Tuning the spin dynamics of kagome systems Tuning the spin dynamics of kagome systems

2011-11-09

arxiv.org/abs/1111.2167v1

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 2 figures

Scientific paper

Despite the conceptional importance of realizing spin liquids in solid states only few compounds are known. On the other side the effect of lattice distortions and anisotropies on the magnetic exchange topology and the fluctuation spectrum are an interesting problem. We compare the excitation spectra of the two s=1/2 kagome lattice compounds volborthite and vesignieite using Raman scattering. We demonstrate that even small modifications of the crystal structure may have a huge effect on the phonon spectrum and low temperature properties.

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