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Phonon density-of-states for the high-T c superconductor La1.85Sr0.15CuO4 and its non-superconducting reference La2CuO4

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Zeitschrift für Physik B Condensed Matter

Abstract

From inelastic neutron-scattering experiments, we determined the generalized phonon density-of-states for the high-T c superconductor La1.85Sr0.15CuO4 and its semiconducting reference La2CuO4 atT=300K andT=6K. The spectra differ only little from each other. In particular, we do not observe any pronounced soft-mode behaviour either on cooling or when comparing the superconducting sample to the non-superconducting reference. We find, however, modest but distinct indications of coupling between electrons and oxygen breathing-modes at high frequencies.

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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, N. Nücker, D. Ewert, W. Reichardt & H. Rietschel

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  1. B. Renker
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  2. F. Gompf
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  3. E. Gering
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  4. N. Nücker
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  5. D. Ewert
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  6. W. Reichardt
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  7. H. Rietschel
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Renker, B., Gompf, F., Gering, E. et al. Phonon density-of-states for the high-T c superconductor La1.85Sr0.15CuO4 and its non-superconducting reference La2CuO4 . Z. Physik B - Condensed Matter 67, 15–18 (1987). https://doi.org/10.1007/BF01307301

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  • DOI: https://doi.org/10.1007/BF01307301

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