Low Temperature Anharmonicity and Superconductivity in Cuprates View Full Text


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Article Info

DATE

2013-11-10

AUTHORS

A. P. Menushenkov, A. V. Kuznetsov, R. V. Chernikov, A. A. Ivanov, V. V. Sidorov, K. V. Klementiev

ABSTRACT

Temperature-dependent X-ray absorption spectra of the hole-doped La2−xSrxCuO4 and electron-doped Nd2−xCexCuO4−δ high-temperature superconductors were investigated above the Cu K absorption edge. We observed strong anharmonicity in the superconductive CuO2 plane. For x=0.15 it was shown that part of oxygen ions oscillate in a double-well potential and their vibrations are correlated with the local electron (hole) pair transfer. We suppose that at a low temperature the phase coherence of the local pair movement is determined by the peculiarities of the perovskite-like structure which includes the stiff CuOn (n=4,6) complexes combined by collective rotational and breathing modes. More... »

PAGES

925-928

References to SciGraph publications

  • 2008-08. Local dynamic deformation of the superconducting CuO2 plane in the Nd2 − xCexCuO4 + δ compound in BULLETIN OF THE RUSSIAN ACADEMY OF SCIENCES: PHYSICS
  • 2013-05. Role of the perovskite-like lattice in the high-temperature superconductor mechanism: EXAFS data analysis in JOURNAL OF SURFACE INVESTIGATION: X-RAY, SYNCHROTRON AND NEUTRON TECHNIQUES
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s10948-013-2411-1

    DOI

    http://dx.doi.org/10.1007/s10948-013-2411-1

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1016097081


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