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Tinkham, M.; Free, J. U.; Lau, C. N.; Markovic, N. |
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Title |
Hysteretic I–V curves of superconducting nanowires |
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2003 |
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Phys. Rev. B |
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68 |
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134515(1 to 7) |
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MoGe nanowires, self-heating effect |
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Experimental I–V curves of superconducting MoGe nanowires show hysteresis for the thicker wires and none for the thinner wires. A rather quantitative account of these data for representative wires is obtained by numerically solving the one-dimensional heat flow equation to find a self-consistent distribution of temperature and local resistivity along the wire, using the measured linear resistance R(T) as input. This suggests that the retrapping current in the hysteretic I–V curves is primarily determined by heating effects, and not by the dynamics of phase motion in a tilted washboard potential as often assumed. Heating effects and thermal fluctuations from the low-resistance state to a high-resistance, quasinormal regime appear to set independent upper bounds for the switching current. |
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918 |
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Author |
Perrin, N.; Vanneste, C. |
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Title |
Response of superconducting films to a periodic optical irradiation |
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Journal Article |
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Year |
1983 |
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Phys. Rev. B |
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28 |
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9 |
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5150-5159 |
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sc_resp_Perrin_1983 |
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233 |
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Romijn, J.; Klapwijk, T. M.; Renne, M. J.; Mooij, J. E. |
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Title |
Critical pair-breaking current in superconducting aluminum strips far below Tc |
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Journal Article |
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Year |
1982 |
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Phys. Rev. B |
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Phys. Rev. B |
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Volume |
26 |
Issue |
7 |
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3648-3655 |
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Keywords |
superconducting nanowire |
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Critical currents of narrow, thin aluminum strips have been measured as a function of temperature. For the smallest samples uniformity of the current density is obtained over a large temperature range. Hence the intrinsic limit on the currentcarrying capacity of the superconductor was measured outside the Ginzburg-Landau -regime. The experimental values are compared with recent theoretical predictions by Kupriyanov and Lukichev. An approximate method of solving their equations is given, the results of which agree with the exact solution to within 1%. Experimental data are in excellent agreement with theoretical predictions. The absolute values agree if one assumes a Ïl value of 4×10–16 Ωm2 with vF=1.3×106 m/s. This value for Ïl is the same as that found from measurements of the anomalous skin effect but differs from values extracted from size-effect-limited resistivity. |
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Recommended by Klapwijk |
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925 |
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Parker, W. H. |
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Modified heating theory of nonequilibrium superconductors |
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1975 |
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Phys. Rev. B |
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12 |
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9 |
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3667-3672 |
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American Physical Society |
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mht_Parker_1975 |
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221 |
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Steudle, Gesine A.; Schietinger, Stefan; Höckel, David; Dorenbos, Sander N.; Zadeh, Iman E.; Zwiller, Valery; Benson, Oliver |
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Measuring the quantum nature of light with a single source and a single detector |
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2012 |
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Phys. Rev. A |
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86 |
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5 |
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053814 |
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SSPD, SNSPD, saturation count rates, dead time, dynamic range |
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An elementary experiment in optics consists of a light source and a detector. Yet, if the source generates nonclassical correlations such an experiment is capable of unambiguously demonstrating the quantum nature of light. We realized such an experiment with a defect center in diamond and a superconducting detector. Previous experiments relied on more complex setups, such as the Hanbury Brown and Twiss configuration, where a beam splitter directs light to two photodetectors, creating the false impression that the beam splitter is a fundamentally required element. As an additional benefit, our results provide a simplification of the widely used photon-correlation techniques. |
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American Physical Society |
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1089 |
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