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Local structural instability of high-T c oxide superconductors studied by inelastic neutron scattering

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Abstract

The scattering function,S(Q, E), of superconducting La1.85Sr0.15CuO4 and YBa2Cu3O7 was measured over a wide range ofQ-E space by inelastic neutron scattering. Fine structures in their phonon density of states as well as theQ-dependences ofS(Q, E) were observed. TheQ-dependence ofS(Q, E) is very susceptive atT c , with an anomalous behavior similar to a critical phenomenon. We have found that the anomalous behavior is related to the local structural instability, i.e., the 〈110〉 buckling motion of the Cu-O plane and the shortening of the distance between the apical oxygen and the copper atom in the plane.

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Authors and Affiliations

  1. Department of Physics, Kobe University, Rokkodai, Nada, 657, Kobe, Japan

    M. Arai

  2. Department of Physics, Tohoku University, Aramaki, Aoba, 980, Sendai, Japan

    K. Yamada & Y. Endoh

  3. Institute of Material Research, Tohoku University, Katahira, 980, Sendai, Japan

    S. Hosoya

  4. Rutherford Appleton Laboratory, OX11 0QX, Chilton, Didcot, Oxon, UK

    A. C. Hannon & A. D. Taylor

  5. NTT Applied Electronics Laboratories, Tokai, Ibaraki, Japan

    Y. Hidaka

Authors
  1. M. Arai
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  2. K. Yamada
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  3. S. Hosoya
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  4. A. C. Hannon
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  5. Y. Hidaka
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  6. A. D. Taylor
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  7. Y. Endoh
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Additional information

This work was done under the UK-Japan collaboration on neutron scattering at the Rutherford Appleton Laboratory in the United Kingdom.

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Arai, M., Yamada, K., Hosoya, S. et al. Local structural instability of high-T c oxide superconductors studied by inelastic neutron scattering. J Supercond 7, 415–418 (1994). https://doi.org/10.1007/BF00724579

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  • DOI: https://doi.org/10.1007/BF00724579

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