Lattice and Charge Effects in High-Temperature Superconductors
We present the results of inelastic neutron-scattering measurements of a twinned crystal of YBa2Cu3O6.95 using the MAPS spectrometer of the ISIS facility of the Rutherford-Appleton Laboratory as well as the HFIR of the Oak Ridge National Laboratory. The dispersion of the Cu-O bond-stretching modes indicates a strong dielectric anisotropy within the plane and associated electronic anisotropy, supporting the dynamic stripe model. The results suggest a possibility that phonons play a major role in the mechanism of high-temperature superconductivity.
T. Egami and R. J. McQueeney and J. Chung and M. Yethiraj and H. A. Mook and M. Arai and Y. Inamura and Y. Endoh and S. Tajima and C. D. Frost and F. Dogan, "Lattice and Charge Effects in High-Temperature Superconductors," Applied Physics A: Materials Science and Processing, vol. 74, no. SUPPL.II, pp. S1635-S1637, Springer Heidelberg, Dec 2002.
The definitive version is available at http://dx.doi.org/10.1007/s003390201933
Materials Science and Engineering
Keywords and Phrases
Anisotropy; Chemical bonds; Crystal lattices; Dielectric properties; Mathematical models; Neutron scattering; Phonons; Superconductivity; Twinning; Yttrium barium copper oxides; Associated electronic anisotropy; charge effects; Dielectric anisotropy; Inelastic neutron scattering; High temperature superconductors
International Standard Serial Number (ISSN)
Article - Journal
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