The electronic structure of CuSiO3 - a possible candidate for a new inorganic spin-Peierls compound ?

Details The electronic structure of CuSiO3 - a possible candidate for a new inorganic spin-Peierls compound ? The electronic structure of CuSiO3 - a possible candidate for a new inorganic spin-Peierls compound ?

2000-04-14

arxiv.org/abs/cond-mat/0004239v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

Electronic structure calculations are presented for the well-known CuGeO3 and the recently discovered isostructural CuSiO3 compounds. The magnitude of the dispersion in chain direction is considerably smaller for CuSiO3, whereas the main interchain couplings are rather similar in both compounds. Starting from extended one-band tight-binding models fitted to the bandstructures, the exchange integrals were estimated for both compounds in terms of a spatially anisotropic Heisenberg model. Remarkable frustrating second neighbor couplings are found both for intra- and inter-chain interactions. A magnetic moment of about 0.35 Bohr-magneton is predicted for CuSiO3 in the Neel state.

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