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Author Romijn, J.; Klapwijk, T. M.; Renne, M. J.; Mooij, J. E.
Title Critical pair-breaking current in superconducting aluminum strips far below Tc Type Journal Article
Year 1982 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 26 Issue 7 Pages 3648-3655
Keywords superconducting nanowire
Abstract 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 ρl value of 4×10–16 Ωm2 with vF=1.3×106 m/s. This value for ρl 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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Notes Recommended by Klapwijk Approved no
Call Number Serial 925
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Author Huard, B.; Pothier, H.; Esteve, D.; Nagaev, K. E.
Title Electron heating in metallic resistors at sub-Kelvin temperature Type Journal Article
Year 2007 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 76 Issue Pages 165426(1-9)
Keywords electron heating in resistor, HEB distributed model, HEB model, hot electrons
Abstract In the presence of Joule heating, the electronic temperature in a metallic resistor placed at sub-Kelvin temperatures can significantly exceed the phonon temperature. Electron cooling proceeds mainly through two processes: electronic diffusion to and from the connecting wires and electron-phonon coupling. The goal of this paper is to present a general solution of the problem in a form that can easily be used in practical situations. As an application, we compute two quantities that depend on the electronic temperature profile: the second and the third cumulant of the current noise at zero frequency, as a function of the voltage across the resistor. We also consider time-dependent heating, an issue relevant for experiments in which current pulses are used, for instance, in time-resolved calorimetry experiments.
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Notes Recommended by Klapwijk as example for writing the article on the HEB model. Approved no
Call Number Serial 936
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Author Bardeen, J; Mattis, D. C.
Title Theory of the anomalous skin effect in normal and superconducting metals Type Journal Article
Year 1958 Publication Phys. Rev. Abbreviated Journal Phys. Rev.
Volume 111 Issue 2 Pages 412-417
Keywords local dirty limit, complex conductivity, HEB
Abstract Chambers' expression for the current density in a normal metal in which the electric field varies over a mean free path is derived from a quantum approach in which use is made of the density matrix in the presence of scattering centers but in the absence of the field. An approximate expression used for the latter is shown to reduce to one derived by Kohn and Luttinger for the case of weak scattering. A general space-and time-varying electromagnetic interaction is treated by first-order perturbation theory. The method is applied to superconductors, and a general expression derived for the kernel of the Pippard integral for fields of arbitrary frequency. The expressions derived can also be used to discuss absorption of electromagnetic radiation in thin superconducting films.
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Notes Approved no
Call Number Serial 937
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Author Boogaard, G.R.; Verbruggen, A.H.; Belzig, W.; Klapwijk T.M.
Title Resistance of superconducting nanowires connected to normal-metal leads Type Journal Article
Year 2004 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 69 Issue Pages 220503(R)(1-4)
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Abstract 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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Notes Approved no
Call Number RPLAB @ atomics90 @ Serial 960
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Author Matthias, B. T.
Title Transition temperatures of superconductors Type Journal Article
Year 1953 Publication Phys. Rev. Abbreviated Journal Phys. Rev.
Volume 92 Issue 4 Pages 874-876
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Abstract Superconductivity has been found in a number of new compounds between the non-superconducting transition elements and nonmetals such as Si, Ge, and Te. These findings have suggested possible criteria for superconductivity in both elements and compounds.
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Call Number RPLAB @ phisix @ Serial 987
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