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Anharmonicity and electron-phonon coupling in cuprate superconductors studied by inelastic neutron scattering

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Abstract

An overview is given on anharmonic lattice vibrations originating from structural instabilities. The transverse vibrations of the chain oxygens in YBa2Cu3O7 are found to be only moderately anharmonic. Measurements of the phonon linewidths in the Cu-O bond stretching vibrations strongly support recent calculations of the electron-phonon coupling. Results are presented on superconductivity-induced frequency shifts at short wavelengths.

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Authors and Affiliations

  1. Kernforschungszentrum Karlsruhe, INFP, Postfach 3640, D-76021, Karlsruhe, Germany

    W. Reichardt, L. Pintschovius, N. Pyka & P. Schweiß

  2. Kristall- und Materiallabor, Universität Karlsruhe, D-76131, Karlsruhe, Germany

    A. Erb

  3. Laboratoire Léon Brillouin, CEA-CNRS, CEN Saclay, F-91191, Gif-sur-Yvette Cedex, France

    P. Bourges, G. Collin & J. Rossat-Mignod

  4. DRF/SPh-MDN, CEN Grenoble, F-38041, Grenoble Cedex, France

    I. Y. Henry

  5. I. V. Kurchatov Institute of Atomic Energy, 123182, Moscow, Russia

    A. S. Ivanov, N. L. Mitrofanov & A. Yu. Rumiantsev

Authors
  1. W. Reichardt
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  2. L. Pintschovius
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  3. N. Pyka
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  4. P. Schweiß
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  5. A. Erb
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  6. P. Bourges
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  7. G. Collin
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  8. J. Rossat-Mignod
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  9. I. Y. Henry
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  10. A. S. Ivanov
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  11. N. L. Mitrofanov
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  12. A. Yu. Rumiantsev
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Reichardt, W., Pintschovius, L., Pyka, N. et al. Anharmonicity and electron-phonon coupling in cuprate superconductors studied by inelastic neutron scattering. J Supercond 7, 399–407 (1994). https://doi.org/10.1007/BF00724577

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  • DOI: https://doi.org/10.1007/BF00724577

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