TY  - JOUR
AU  - Beck, M.
AU  - Klammer, M.
AU  - Lang, S.
AU  - Leiderer, P.
AU  - Kabanov, V. V.
AU  - Gol'tsman, G. N.
AU  - Demsar, J.
PY  - 2011
DA  - 2011//
TI  - Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy
T2  - Phys. Rev. Lett.
JO  - Phys. Rev. Lett.
SP  - 4
VL  - 107
IS  - 17
KW  - NbN thin film
KW  - energy gap dynamics
AB  - 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.
UR  - https://doi.org/10.1103/PhysRevLett.107.177007
DO  - 10.1103/PhysRevLett.107.177007
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=641), last updated on Thu, 13 May 2021 19:28:09 -0500
ID  - Beck_etal2011
ER  -