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Terahertz transmission of NbN superconductor thin film
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SYSNO ASEP 0348301 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Terahertz transmission of NbN superconductor thin film Author(s) Tesař, Roman (FZU-D) RID, ORCID
Koláček, Jan (FZU-D) RID, ORCID
Šimša, Zdeněk (FZU-D)
Šindler, Michal (FZU-D) RID, ORCID
Skrbek, L. (CZ)
Il'in, K. (DE)
Sieger, M. (DE)Source Title Physica. C. - : Elsevier - ISSN 0921-4534
Roč. 470, č. 19 (2010), s. 932-934Number of pages 3 s. Language eng - English Country NL - Netherlands Keywords far-infrared transmission ; NbN ; superconducting film ; magnetic vortices ; terahertz waves 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 000282454400057 DOI 10.1016/j.physc.2010.02.077 Annotation Transmission of terahertz waves through a thin layer of the NbN superconductor deposited on a sapphire substrate was studied as a function of temperature in zero field as well as in magnetic field perpendicular to the sample. For photon energies lower than optical gap, detailed temperature measurements in zero field provide BCS-like curves with a pronounced peak below the critical temperature. In accordance with the BCS model, the temperature peak disappears as the energy of incident radiation is increased above the gap. In non-zero field, the temperature behavior of transmission is modified because the gap is suppressed and vanishes at upper critical field. In addition, the presence of quantized vortices in the superconducting film substantially changes shape of the temperature curves Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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