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Terahertz thermal spectroscopy of a NbN superconductor

SYSNO ASEP	0367191
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Terahertz thermal spectroscopy of a NbN superconductor
Author(s)	Tesař, Roman (FZU-D)_{RID, ORCID} Šindler, Michal (FZU-D)_{RID, ORCID} Il'in, K. (DE) Koláček, Jan (FZU-D)_{RID, ORCID} Siegel, M. (DE) Skrbek, L. (CZ)
Source Title	Physical Review. B - ISSN 1098-0121 Roč. 84, č. 13 (2011), 132506/1-132506/4
Number of pages	4 s.
Language	eng - English
Country	US - United States
Keywords	response to electromagnetic fields ; optical properties ; superconducting films ; low-dimensional structures
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GAP204/11/0015 GA ČR - Czech Science Foundation (CSF)
	ME10069 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
UT WOS	000296657900002
DOI	10.1103/PhysRevB.84.132506
Annotation	We report far-infrared optical properties of a NbN superconductor. Transmission through a high-quality NbN film grown on a birefringent sapphire substrate above and below its superconducting transition down to the zero-temperature limit is measured at six different frequencies from 0.4 to 2.5 THz both above and below its optical gap. The experimental results agree with theoretical calculations developed based on utilization and extension of the BCS model of Zimmermann et al. [Physica C 183, 99 (1991)] applied for the NbN film. Full quantitative agreement over the entire ranges of temperature and frequencies is found based solely on the physical properties of this NbN film sample and on the parameters of an identical sapphire substrate as measured in time-domain spectroscopy experiments, without use of any additional fitting parameters.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1