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Far-infrared transmission of a superconducting NbN film
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SYSNO ASEP 0353313 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Far-infrared transmission of a superconducting NbN film Author(s) Šindler, M. (CZ)
Tesař, Roman (FZU-D) RID, ORCID
Koláček, Jan (FZU-D) RID, ORCID
Skrbek, L. (CZ)
Šimša, Zdeněk (FZU-D)Source Title Physical Review. B - ISSN 1098-0121
Roč. 81, č. 18 (2010), 184529/1-184529/5Number of pages 5 s. Language eng - English Country US - United States Keywords superconductivity ; BCS theory ; terahertz radiation Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/08/0326 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000278141800108 DOI 10.1103/PhysRevB.81.184529 Annotation We report far-infrared optical properties of a thin NbN supercondu ctor in magnetic field, B, up to 10 T. Transmission, Tr(T,B), of monochromatic linearly polarized laser beam with frequency below and above an optical gap is measured both below and above Tc. Tr(T,B=0) is well described by the BCS-based model that approximates the sample as a mixture of superconductors with different Tc. Tr(T,B not equal to 0) appears qualitatively different for Voigt and Faraday geometry. To calculate optical properties, we use Bruggeman’s approach and present a phenomenological model accounting for both field orientations. The model captures all observed features of the Tr(T,B) data. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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