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Interpretation of transmission through type II superconducting thin film on dielectric substrate as observed by laser thermal spectroscopy
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SYSNO ASEP 0385841 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Interpretation of transmission through type II superconducting thin film on dielectric substrate as observed by laser thermal spectroscopy Author(s) Šindler, Michal (FZU-D) RID, ORCID
Tesař, Roman (FZU-D) RID, ORCID
Koláček, Jan (FZU-D) RID, ORCID
Skrbek, L. (CZ)Source Title Physica. C. - : Elsevier - ISSN 0921-4534
Roč. 483, DEC (2012), s. 127-135Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords far-infrared transmission ; NbN ; superconducting film ; vortices ; terahertz waves Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/11/0015 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000311348800027 DOI 10.1016/j.physc.2012.05.019 Annotation We provide a thorough analysis of THz properties of BCS-like superconducting thin films. Temperature and frequency dependence of complex conductivity in zero magnetic field is discussed by utilizing the Zimmerman et al. explicit BCS based formula [Physica C 183 (1991) 99]. We extend this approach by employing the effective medium theory and develop a phenomenological model capable of accounting for the influence of external magnetic field. Using Yeh powerful formalism [Surface Sci. 96 (1980) 41] we calculate optical transmission of linearly polarized laser beam normally incident to a multilayered sample consisting of a thin NbN film grown on birefringent sapphire substrate, entirely covering ranges of interest in temperature and frequency. A proposal to exploit linear polarization of the incident beam parallel with principal axes of conductivity tensor is explained and theoretical predictions for a realistic NbN sample are computed and discussed. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2013
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