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Composition Dependence Of The In-Plane Cu-O Bond-Stretching Lo Phonon Mode In Yba₂Cu₃O₆₊ₓ, F. Stercel, T. Egami, H. A. Mook, M. Yethiraj, M. Arai, C. Frost, Fatih Dogan, J. H. Chung
Composition Dependence Of The In-Plane Cu-O Bond-Stretching Lo Phonon Mode In Yba₂Cu₃O₆₊ₓ, F. Stercel, T. Egami, H. A. Mook, M. Yethiraj, M. Arai, C. Frost, Fatih Dogan, J. H. Chung
Materials Science and Engineering Faculty Research & Creative Works
An inelastic pulsed neutron scattering study was performed on the dependence of the dispersion and spectral intensity of the in-plane Cu-O bond-stretching LO phonon mode on doped charge density. The measurements were made in the time-of-flight mode with the multiangle position sensitive spectrometer of the ISIS facility on single crystals of YBa2Cu3O6+x (x=0.15, 0.35, 0.6, 0.7, and 0.95). The focus of the study is the in-plane Cu-O bond-stretching LO phonon mode, which is known for strong electron-phonon coupling and unusual dependence on composition and temperature. It is shown that the dispersions for the samples with x=0.35, 0.6, and 0.7 are …