Plasmons and Interband Transitions of Ca$_{11}$Sr$_3$Cu$_{24}$O$_{41}$ investigated by Electron Energy-Loss Spectroscopy
Friedrich Roth,
Christian Hess,
Bernd Büchner
et al.
Abstract:Electron energy-loss spectroscopy studies have been performed in order to get a deeper insight into the electronic structure and elementary excitations of the two -leg ladder system Ca 11 Sr 3 Cu 24 O 41 . We find a strong anisotropy of the loss function for momentum transfers along the a and c -crystallographic axis, and a remarkable linear plasmon dispersion for a momentum transfer parallel to the legs of the ladders. The investigated spectral features are attributed to localized and delocalized charge-trans… Show more
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