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Phonon density-of-states for high-T c (Y, RE) Ba2Cu3O7 superconductors and non-superconducting reference systems

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Zeitschrift für Physik B Condensed Matter

Abstract

From inelastic neutron scattering experiments, we determined the generalized phonon density-of-states (PDOS) for the high-T c superconductors MEBA2Cu3O7 (ME=Y, Y0.5Pr0.5, Nd) and the non-superconducting references YBa2Cu3O6 and PrBa2Cu3O7. A detailed study of the Y-O7 compound at temperatures between 300 K and 6 K gave no evidence of any pronounced soft-mode behaviour. Moderate changes only occur in the PDOS between Nd and Pr samples and Y and Y0.5Pr0.5 samples, respectively, but drastic differences show up in the Y-O7 and Y-O6 spectra. Thus, we could not find correlations betweenT c -values and particular features in the PDOS although there is some evidence that electron-phonon coupling is strong in this class of materials.

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Authors and Affiliations

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

    B. Renker, F. Gompf, E. Gering, G. Roth, W. Reichardt, D. Ewert & H. Rietschel

  2. Institut Max von Laue-Paul Langevin, B.P. 156X, F-38042, Grenoble, France

    H. Mutka

Authors
  1. B. Renker
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  2. F. Gompf
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  3. E. Gering
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  4. G. Roth
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  5. W. Reichardt
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  6. D. Ewert
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  7. H. Rietschel
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  8. H. Mutka
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Renker, B., Gompf, F., Gering, E. et al. Phonon density-of-states for high-T c (Y, RE) Ba2Cu3O7 superconductors and non-superconducting reference systems. Z. Physik B - Condensed Matter 71, 437–442 (1988). https://doi.org/10.1007/BF01313929

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  • DOI: https://doi.org/10.1007/BF01313929

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