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Changes in the phonon spectra of Bi 2212 superconductors connected with the metal-semiconductor transition in the series of Bi2Sr2(Ca1−xYx)Cu2O8 compounds

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Zeitschrift für Physik B Condensed Matter

Abstract

By means of inelastic neutron scattering the phonon density of states (PDOS) has been measured for compounds Bi2Sr2(Ca1−xYx)Cu2O8+δ for different values ofx. The transition from a superconducting to a semiconducting material is paralleled by characteristic changes in the PDOS as it was observed before for other HTC ceramics. The results are discussed on the basis of a model calculation and it can be shown that high frequency oxygen vibrations in the Cu−O sublattice are stongly renormalized in the superconducting compound.

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Authors and Affiliations

  1. Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500, Karlsruhe 1, Federal Republic of Germany

    B. Renker, F. Gompf, D. Ewert, P. Adelmann & H. Schmidt

  2. Europäisches Institut für Transurane, D-7500, Karlsruhe, Federal Republic of Germany

    E. Gering

  3. Institut Laue-Langevin, Av. des Martyrs 53 156-Centre de Tri, F-38042, Grenoble, France

    H. Mutka

Authors
  1. B. Renker
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  2. F. Gompf
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  3. D. Ewert
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  4. P. Adelmann
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  5. H. Schmidt
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  6. E. Gering
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  7. H. Mutka
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Renker, B., Gompf, F., Ewert, D. et al. Changes in the phonon spectra of Bi 2212 superconductors connected with the metal-semiconductor transition in the series of Bi2Sr2(Ca1−xYx)Cu2O8 compounds. Z. Physik B - Condensed Matter 77, 65–68 (1989). https://doi.org/10.1007/BF01313621

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  • DOI: https://doi.org/10.1007/BF01313621

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