10 August 1994 Electronic light scattering in oxide superconducting and related materials
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Abstract
A detailed study of electron Raman scattering (RS) has been carried out in superconducting and insulating YBa2Cu3O6+x single crystals. The spectral redistribution at frequencies (omega) equals 600 cm-1 in different polarizations indicate that the superconducting gap is strongly anisotropic. In the normal (metallic) phase the behavior of the imagery part of the response function R'((omega) ) in the polarization (x'x') corresponds to the model of a marginal Fermi liquid, and in the polarization (x'y') and (zz), this behavior is independent of the temperature. In insulating crystals, R'((omega) ) is independent of the temperature up to T >= 200 K in both polarizations. The studies of two-magnon RS were carried out on YBa2Cu3O6+x crystals with oxygen content near the metal- insulator transition. It was found that the chain oxygen reordering processes strongly influence the two-magnon RS spectrum.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ilia I. Tartakovskii, Andrei A. Maksimov, "Electronic light scattering in oxide superconducting and related materials", Proc. SPIE 2158, Oxide Superconductor Physics and Nano-Engineering, (10 August 1994); doi: 10.1117/12.182678; https://doi.org/10.1117/12.182678
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