Počet záznamů: 1

Terahertz thermal spectroscopy of a NbN superconductor

  1. 1.
    0367191 - FZU-D 2012 RIV US eng J - Článek v odborném periodiku
    Tesař, Roman - Šindler, Michal - Il'in, K. - Koláček, Jan - Siegel, M. - Skrbek, L.
    Terahertz thermal spectroscopy of a NbN superconductor.
    Physical Review. B. Roč. 84, č. 13 (2011), 132506/1-132506/4 ISSN 1098-0121
    Grant CEP: GA ČR(CZ) GAP204/11/0015; GA MŠk(CZ) ME10069
    Výzkumný záměr: CEZ:AV0Z10100521
    Klíčová slova: response to electromagnetic fields * optical properties * superconducting films * low-dimensional structures
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.691, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0201944