Abstract
Based on the low-temperature optical experiments (absorption and reflection) in visible and middle infrared frequency regions with epitaxial films of copper oxide materials like a YiBa2Cu306+x, we considered the anomalous spectral effects in HTSC having no analogy with conventional BCS superconductors: (1) the optical response to superconducting transition at Tc; (2) the spectral weight redistribution induced by doping and temperature; (3) the drastic enhancement of low-temperature photodoping; (4) the long spin-structure relaxation via temperature variations seen in the optical spectra. The thorough analysis of the results obtained is fully compatible with the concept of two-component system of light and heavy carriers (holes), being in dynamical coexistence. The dynamical coexistence of the intraband carriers occurs on the background of strongly correlation interrelation of the carriers with the interband (charge transfer) excitations.
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Fugol, I.Y., Samovarov, V.N., Libin, M.Y. (2001). Optical Study of YBCO Thin Films: Spectral Anomales of Low Temperature Dynamics of Strongly Correlated Charges. In: Drechsler, SL., Mishonov, T. (eds) High-Tc Superconductors and Related Materials. NATO Science Series, vol 86. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0758-0_18
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DOI: https://doi.org/10.1007/978-94-010-0758-0_18
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