Pseudo-gap and superconducting condensate energies in the infrared spectra of Pr-doped YBa 2 Cu 3 O 7

Autor:	Guy Deutscher, Ricardo P. S. M. Lobo, D. Racah, Yoram Dagan, N. Bontemps
Rok vydání:	2001
Předmět:	Superconductivity Materials science chemistry Infrared Phase (matter) Doping General Physics and Astronomy chemistry.chemical_element Infrared spectroscopy Yttrium Conductivity Optical conductivity Molecular physics
Zdroj:	Europhysics Letters (EPL). 55:854-860
ISSN:	1286-4854 0295-5075
Popis:	The (a,b)-plane infrared and visible conductivity (30–30000 cm−1) of a 40% praseodymium-substituting yttrium YBa2Cu3O7 film displays a loss of spectral weight over two separate energy ranges when lowering the temperature. A first loss of spectral weight is present in the range 300–800 cm−1 from room temperature down to 40 K (Tc = 35 K). A further distinct spectral weight diminution appears in the superconducting phase at frequencies below 200 cm−1. This diminution can be observed due to the high signal-to-noise ratio allowed by the large area of the thin film. We propose that the lower energy loss of spectral weight reflects the formation and the properties of the superconducting condensate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ee636a7d8a7abe070f554d93dbd82d5 https://doi.org/10.1209/epl/i2001-00360-9 Zobrazit plný text záznamu