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Far-infrared transmission of a superconducting NbN film
- 1.0353313 - FZÚ 2011 RIV US eng J - Journal Article
Šindler, M. - Tesař, Roman - Koláček, Jan - Skrbek, L. - Šimša, Zdeněk
Far-infrared transmission of a superconducting NbN film.
Physical Review. B. Roč. 81, č. 18 (2010), 184529/1-184529/5. ISSN 1098-0121
R&D Projects: GA ČR GA202/08/0326
Institutional research plan: CEZ:AV0Z10100521
Keywords : superconductivity * BCS theory * terahertz radiation
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.772, year: 2010
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.
Permanent Link: http://hdl.handle.net/11104/0192592
Number of the records: 1