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Electrodynamics of (Nd,Eu,Gd)Ba.sub.2./sub.Cu.sub.3./sub.O.sub.y./sub. single crystals
- 1.0387786 - FZÚ 2013 RIV NL eng J - Journal Article
Rameš, Michal - Železný, Vladimír - Ta Phuoc, V. - Gervais, F. - Wolf, T. - Jirsa, Miloš
Electrodynamics of (Nd,Eu,Gd)Ba2Cu3Oy single crystals.
Physics Procedia. Roč. 36, č. 2012 (2012), s. 532-537. ISSN 1875-3892
R&D Projects: GA MŠMT(CZ) ME10069
Institutional research plan: CEZ:AV0Z10100520
Keywords : optical properties * pseudogap * two-component model * cuprates * memory function
Subject RIV: BM - Solid Matter Physics ; Magnetism
ab-plane infrared spectra of two single-crystalline (Nd,Eu,Gd)Ba2Cu3Oy superconductors (NEG-123) with different Gd, Eu ratio were studied. Infrared reflectance was measured between 10 and 300 K at frequencies from 35 to 8000 cm-1. The experimental data were interpreted in terms of the two- and one-component models. The crystal with higher Gd content had more distinguished spectral features (phonons, the middle-infrared band) and about half concentration of charge carriers than the other crystal. We attribute this result to the fact that spectral features are screened by charge carriers and that the screening weakens with decreasing carrier concentration.
Permanent Link: http://hdl.handle.net/11104/0216717
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