0000000000659153

AUTHOR

U. Weimer

showing 2 related works from this author

Phonon Softening and Electron-Phonon Interaction in YBa2Cu3O7−δ

1993

We report on the Raman scattering investigation of the 335 cm−1 phonon of Ag (pseudo-B1g) symmetry in thin YBa2Cu3O7−δfilms on various substrates. The experiments yield values for the phonon softening below Tc, which differ from sample to sample. We find a linear relation between the softening and the inverse asymmetry parameter of the phonon Fano-like lineshape, when these parameters, obtained from different samples, are compared with each other. In contrast to this, the onset temperatures for the softening are the same for these samples.

Materials scienceYield (engineering)Condensed matter physicsPhononmedia_common.quotation_subjectElectron phononYba2cu3o7 δCondensed Matter::Mesoscopic Systems and Quantum Hall EffectAsymmetrySymmetry (physics)Condensed Matter::Materials Sciencesymbols.namesakeCondensed Matter::SuperconductivitysymbolsCondensed Matter::Strongly Correlated ElectronsSofteningRaman scatteringmedia_common
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Anomalous intensity of the 335 cm−1 phonon in YBa2Cu3O7−δ

1991

Abstract We report results on Raman scattering for the intensity of the 335 cm −1 phonon of A g (pseudo B 1g ) symmetry in thin YBa 2 Cu 3 O 7−δ films on MgO and LaAlO 3 substrates. The intensity of this phonon shows a pronounced increase below 100 K and saturates at low temperatures. We also observe an additional intensity peaking at temperatures close to the superconducting transition T C . This may indicate a structural phase transition in the vicinity of T C .

chemistry.chemical_classificationSuperconductivityMaterials scienceHigh-temperature superconductivityCondensed matter physicsPhononEnergy Engineering and Power TechnologyCondensed Matter PhysicsElectronic Optical and Magnetic Materialslaw.inventionsymbols.namesakechemistrylawsymbolsElectrical and Electronic EngineeringAnomaly (physics)Thin filmInorganic compoundIntensity (heat transfer)Raman scatteringPhysica C: Superconductivity
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