Publikation: Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy
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2011
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Klammer, Maximilian
Lang, S.
Goltsman, Gregory
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Physical Review Letters. 2011, 107(17). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.107.177007
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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.
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BECK, Matthias, Maximilian KLAMMER, S. LANG, Paul LEIDERER, Viktor V. KABANOV, Gregory GOLTSMAN, Jure DEMSAR, 2011. Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy. In: Physical Review Letters. 2011, 107(17). ISSN 0031-9007. Available under: doi: 10.1103/PhysRevLett.107.177007BibTex
@article{Beck2011Energ-17046, year={2011}, doi={10.1103/PhysRevLett.107.177007}, title={Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy}, number={17}, volume={107}, issn={0031-9007}, journal={Physical Review Letters}, author={Beck, Matthias and Klammer, Maximilian and Lang, S. and Leiderer, Paul and Kabanov, Viktor V. and Goltsman, Gregory and Demsar, Jure} }
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