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Rothwarf, Allen; Taylor, B. N. |
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Title |
Measurement of recombination lifetimes in superconductors |
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1967 |
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Phys. Rev. Lett. |
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19 |
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1 |
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27-30 |
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American Physical Society |
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no |
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MSPU @ s @ |
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220 |
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Author |
Bremer, J. W.; Newhouse, V. L. |
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Journal Article |
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1958 |
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Phys. Rev. Lett. |
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1 |
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282 |
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Bremer, J. W.; Newhouse, V. L. |
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MSPU @ s @ bremer_prl_1958 |
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215 |
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Author |
Boogaard, G.R.; Verbruggen, A.H.; Belzig, W.; Klapwijk T.M. |
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Title |
Resistance of superconducting nanowires connected to normal-metal leads |
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Journal Article |
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Year |
2004 |
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Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
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69 |
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220503(R)(1-4) |
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We study experimentally the low temperature resistance of superconducting nanowires connected to normal metal reservoirs. Wefind that a substantial fraction of the nanowires is resistive, down to the lowest tempera-ture measured, indicative of an intrinsic boundary resistance due to the Andreev-conversion of normal current to supercurrent. The results are successfully analyzed in terms of the kinetic equations for diffusive superconductors. |
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RPLAB @ atomics90 @ |
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960 |
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Beck, M.; Klammer, M.; Lang, S.; Leiderer, P.; Kabanov, V. V.; Gol'tsman, G. N.; Demsar, J. |
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Title |
Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy |
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Journal Article |
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2011 |
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Phys. Rev. Lett. |
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Phys. Rev. Lett. |
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107 |
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17 |
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4 |
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NbN thin film, energy gap dynamics |
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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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RPLAB @ gujma @ |
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641 |
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Kerman, Andrew J.; Yang, Joel K. W.; Molnar, Richard J.; Dauler, Eric A.; Berggren, Karl K. |
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Title |
Electrothermal feedback in superconducting nanowire single-photon detectors |
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Journal Article |
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2009 |
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Phys. Rev. B |
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Phys. Rev. B |
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79 |
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10 |
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4 |
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SNSPD |
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We investigate the role of electrothermal feedback in the operation of superconducting nanowire single-photon detectors (SNSPDs). It is found that the desired mode of operation for SNSPDs is only achieved if this feedback is unstable, which happens naturally through the slow electrical response associated with their relatively large kinetic inductance. If this response is sped up in an effort to increase the device count rate, the electrothermal feedback becomes stable and results in an effect known as latching, where the device is locked in a resistive state and can no longer detect photons. We present a set of experiments which elucidate this effect and a simple model which quantitatively explains the results. |
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RPLAB @ gujma @ |
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680 |
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