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Lattice dynamics and electron-phonon coupling in high-T c superconductors

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Festkörperprobleme 30

Part of the book series: Advances in Solid State Physics ((ASSP,volume 30))

Abstract

Inelastic neutron scattering experiments on high-T c superconductors produced a wealth of information on the lattice dynamics of this class of materials. For (La,Sr)2CuO4 and YBa2Cu3O6/O7 the very complex phonon disperson curves could be unravelled to a large extent. They reflect on the one hand the ionic character of these compounds, on the other hand the screening of the Coulomb forces by free carriers. A model analysis of the dispersion curves shows the need for long range forces as in the case of conventional superconductors. Anomalous features were observed for high frequency Cu−O bond bending and bond stretch vibrations, which have no counterpart in classical superconductors. Strong changes of the anomalies on doping point to an electronic origin of these phenomena.

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Authors and Affiliations

  1. Institut für Nukleare Festkörperphysik, Kernforschunszentrum Karlsruhe, P.O. Box 3640, D-7500, Karlsruhe, Federal Republic of Germany

    Lothar Pintschovius

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  1. Lothar Pintschovius
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Ulrich Rössler

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© 1990 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH

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Pintschovius, L. (1990). Lattice dynamics and electron-phonon coupling in high-T c superconductors. In: Rössler, U. (eds) Festkörperprobleme 30. Advances in Solid State Physics, vol 30. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0108288

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  • DOI: https://doi.org/10.1007/BFb0108288

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  • Print ISBN: 978-3-528-08038-9

  • Online ISBN: 978-3-540-75346-9

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