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Author Perrin, N.; Vanneste, C.
Title Response of superconducting films to a periodic optical irradiation Type Journal Article
Year 1983 Publication Phys. Rev. B Abbreviated Journal
Volume 28 Issue 9 Pages 5150-5159
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Call Number sc_resp_Perrin_1983 Serial 233
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Author Shytov, A. V.; Levitov, L. S.; Beenakker, C. W. J.
Title Electromechanical noise in a diffusive conductor Type Journal Article
Year 2002 Publication Phys. Rev. Lett. Abbreviated Journal Phys. Rev. Lett.
Volume 88 Issue 22 Pages
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Abstract Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. The root-mean-squared momentum transfer per scattering event in a disordered metal (of dimension L greater than the mean free path l and screening length xi) is found to be reduced below the Fermi momentum by a factor of order l/L for shear fluctuations and (xi/L)^2 for pressure fluctuations. The excitation of an elastic bending mode by the shear fluctuations is estimated to fall within current experimental sensitivity for a nanomechanical oscillator.
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ISSN 0031-9007 ISBN Medium
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Call Number RPLAB @ s @ Serial 433
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Author Bulaevskii, L. N.; Graf, M. J.; Batista, C. D.; Kogan, V. G.
Title Vortex-induced dissipation in narrow current-biased thin-film superconducting strips Type Journal Article
Year 2011 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 83 Issue 14 Pages 9
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Abstract A vortex crossing a thin-film superconducting strip from one edge to the other, perpendicular to the bias current, is the dominant mechanism of dissipation for films of thickness d on the order of the coherence length ξ and of width w much narrower than the Pearl length Λâ‰<ab>wâ‰<ab>ξ. At high bias currents I*<I<Ic the heat released by the crossing of a single vortex suffices to create a belt-like normal-state region across the strip, resulting in a detectable voltage pulse. Here Ic is the critical current at which the energy barrier vanishes for a single vortex crossing. The belt forms along the vortex path and causes a transition of the entire strip into the normal state. We estimate I* to be roughly Ic/3. Furthermore, we argue that such “hot” vortex crossings are the origin of dark counts in photon detectors, which operate in the regime of metastable superconductivity at currents between I* and Ic. We estimate the rate of vortex crossings and compare it with recent experimental data for dark counts. For currents below I*, that is, in the stable superconducting but resistive regime, we estimate the amplitude and duration of voltage pulses induced by a single vortex crossing.
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Call Number RPLAB @ gujma @ Serial 688
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Author Minaeva, Olga; Bonato, Cristian; Saleh, Bahaa E. A.; Simon, David S.; Sergienko, Alexander V.
Title Odd- and even-order dispersion cancellation in quantum interferometry Type Journal Article
Year 2009 Publication Phys. Rev. Lett. Abbreviated Journal Phys. Rev. Lett.
Volume 102 Issue 10 Pages 4
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Abstract We describe a novel effect involving odd-order dispersion cancellation. We demonstrate that odd- and even-order dispersion cancellation may be obtained in different regions of a single quantum interferogram using frequency-anticorrelated entangled photons and a new type of quantum interferometer. This offers new opportunities for quantum communication and metrology in dispersive media.
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Call Number RPLAB @ gujma @ Serial 699
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Author Usadel, Klaus D.
Title Generalized diffusion equation for superconducting alloys Type Journal Article
Year 1970 Publication Phys. Rev. Lett. Abbreviated Journal Phys. Rev. Lett.
Volume 25 Issue 8 Pages 507
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Abstract Eilenberger's transportlike equations for a superconductor of type II can be simplified very much in the dirty limit. In this limit a diffusionlike equation is derived which is the generalization of the de Gennes-Maki theory for dirty superconductors to arbitrary values of the order parameter.
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Call Number Serial 920
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