Charge density waves in Sr_14-xCa_xCu_24O_41: electron correlations vs. structural effects

K. -Y. Choi, M. Grove, P. Lemmens +7

We report inelastic light scattering experiments in the spin-chain and ladder system Sr_14-xCa_xCu_24O_41. A depletion of an electronic background is observed for 0 < x < 5 at low…