Vibrational spectra of copper polysilicate, CuSiO3

Details Vibrational spectra of copper polysilicate, CuSiO3 Vibrational spectra of copper polysilicate, CuSiO3

2009-03-23

arxiv.org/abs/0903.3901v1

Physics

Condensed Matter

Materials Science

9 pages, 4 figures

Scientific paper

This is a representation of the first Raman and IR / FIR spectra for orthorhombic copper polysilicate, CuSiO3, measured at room temperature on polycrystalline samples and a comparison of the optical phonons with those observed for the spin-Peierls compound CuGeO3. CuSiO3 represents a further example of a quasi-one-dimensional spin = 1/2 antiferromagnetic Heisenberg chain system. A mode assignment for the silicate is given. From the analysis of the Davydov doublets a reduced intralayer- to-interlayer bond strength of the silicate in comparison to the germanate is obtained allowing for different magnetic response at low temperature.

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