%0 Journal Article
%T Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy
%A Beck, M.
%A Klammer, M.
%A Lang, S.
%A Leiderer, P.
%A Kabanov, V. V.
%A Gol'tsman, G. N.
%A Demsar, J.
%J Phys. Rev. Lett.
%D 2011
%V 107
%N 17
%F Beck_etal2011
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=641), last updated on Thu, 13 May 2021 19:28:09 -0500
%X Using time-domain terahertz spectroscopy we performed direct studies of the photoinduced suppression and recovery of the superconducting gap in a conventional BCS superconductor NbN. Both processes are found to be strongly temperature and excitation density dependent. The analysis of the data with the established phenomenological Rothwarf-Taylor model enabled us to determine the bare quasiparticle recombination rate, the Cooper pair-breaking rate and the electron-phonon coupling constant, λ=1.1±0.1, which is in excellent agreement with theoretical estimates.
%K NbN thin film
%K energy gap dynamics
%R 10.1103/PhysRevLett.107.177007
%U https://doi.org/10.1103/PhysRevLett.107.177007
%P 4