Lattice and Charge Effects in High-Temperature Superconductors
- Egami, Takeshi
- McQueeney, R. J.
- Chung, Jaeho
- Yethiraj, Mohana
- Mook, Herbert A.
- Arai, Masatoshi
- Inamura, Yasuhiro
- Endoh, Yasuo
- Tajima, Setsuko
- Frost, Christopher D.
- Dogan, Fatih
Publication date
December 2002
DOI Publisher
Springer Science and Business Media LLCAbstract
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
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