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| Author | Tinkham, M.; Free, J. U.; Lau, C. N.; Markovic, N. | ||||
| Title | Hysteretic I–V curves of superconducting nanowires | Type | Journal Article | ||
| Year | 2003 | Publication | Phys. Rev. B | Abbreviated Journal | |
| Volume | 68 | Issue | Pages | 134515(1 to 7) | |
| Keywords | MoGe nanowires, self-heating effect | ||||
| Abstract | 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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Approved | no | |||
| Call Number | Serial | 918 | |||
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| Author | Shah, Nayana; Pekker, David; Goldbart, Paul M. | ||||
| Title | Inherent stochasticity of superconductor-resistor switching behavior in nanowires | Type | Journal Article | ||
| Year | 2008 | Publication | Phys. Rev. Lett. | Abbreviated Journal | Phys. Rev. Lett. |
| Volume | 101 | Issue | Pages | 207001(1 to 4) | |
| Keywords | superconducting nanowires, phase-slip, self-heating effect, temperature profile | ||||
| Abstract | We study the stochastic dynamics of superconductive-resistive switching in hysteretic current-biased superconducting nanowires undergoing phase-slip fluctuations. We evaluate the mean switching time using the master-equation formalism, and hence obtain the distribution of switching currents. We find that as the temperature is reduced this distribution initially broadens; only at lower temperatures does it show the narrowing with cooling naively expected for phase slips that are thermally activated. We also find that although several phase-slip events are generally necessary to induce switching, there is an experimentally accessible regime of temperatures and currents for which just one single phase-slip event is sufficient to induce switching, via the local heating it causes. | ||||
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| Notes |
Approved | no | |||
| Call Number | Serial | 919 | |||
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| Author | Pothier, H.; Guéron, S.; Birge, Norman O.; Esteve, D.; Devoret, M. H. | ||||
| Title | Energy distribution function of quasiparticles in mesoscopic wires | Type | Journal Article | ||
| Year | 1997 | Publication | Phys. Rev. Lett. | Abbreviated Journal | |
| Volume | 79 | Issue | 18 | Pages | 3490-3493 |
| Keywords | tunnel probe, metallic nanowire, diffusive wire, diffusive nanowire | ||||
| Abstract | We have measured with a tunnel probe the energy distribution function of Landau quasiparticles in metallic diffusive wires connected to two reservoir electrodes, with an applied bias voltage. The distribution function in the middle of a 1.5-μm-long wire resembles the half sum of the Fermi distributions of the reservoirs. The distribution functions in 5-μm-long wires are more rounded, due to interactions between quasiparticles during the longer diffusion time across the wire. From the scaling of the data with the bias voltage, we find that the scattering rate between two quasiparticles varies as <c9><203a>–2, where <c9><203a> is the energy transferred. | ||||
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Approved | no | |||
| Call Number | Serial | 921 | |||
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| Author | Korneev, A.; Divochiy, A.; Marsili, F.; Bitauld, D.; Fiore, A.; Seleznev, V.; Kaurova, N.; Tarkhov, M.; Minaeva, O.; Chulkova, G.; Smirnov, K.; Gaggero, A.; Leoni, R.; Mattioli, F.; Lagoudakis, K.; Benkhaoul, M.; Levy, F.; Goltsman, G. | ||||
| Title | Superconducting photon number resolving counter for near infrared applications | Type | Conference Article | ||
| Year | 2008 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
| Volume | 7138 | Issue | Pages | 713828 (1 to 5) | |
| Keywords | PNR SSPD; SNSPD; Nanowire superconducting single-photon detector, ultrathin NbN film, infrared | ||||
| Abstract | We present a novel concept of photon number resolving detector based on 120-nm-wide superconducting stripes made of 4-nm-thick NbN film and connected in parallel (PNR-SSPD). The detector consisting of 5 strips demonstrate a capability to resolve up to 4 photons absorbed simultaneously with the single-photon quantum efficiency of 2.5% and negligibly low dark count rate. | ||||
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| Publisher | Spie | Place of Publication | Editor | Tománek, P.; Senderáková, D.; Hrabovský, M. | |
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Approved | no | |||
| Call Number | 10.1117/12.818079 | Serial | 1241 | ||
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| Author | Korneeva, Yuliya; Florya, Irina; Vdovichev, Sergey; Moshkova, Mariya; Simonov, Nikita; Kaurova, Natalia; Korneev, Alexander; Goltsman, Gregory | ||||
| Title | Comparison of hot-spot formation in NbN and MoN thin superconducting films after photon absorption | Type | Conference Article | ||
| Year | 2017 | Publication | IEEE Transactions on Applied Superconductivity | Abbreviated Journal | IEEE Transactions on Applied Superconductiv |
| Volume | 27 | Issue | 4 | Pages | 5 |
| Keywords | Thin film devices, Superconducitng photoncounting devices, Nanowire single-photon detectors | ||||
| Abstract | In superconducting single-photon detectors SSPD the efficiency of local suppression of superconductivity and hotspot formation is controlled by diffusivity and electron-phonon interaction time. Here we selected a material, 3.6-nm-thick MoNx film, which features diffusivity close to those of NbN traditionally used for SSPD fabrication, but with electron-phonon interaction time an order of magnitude larger. In MoNx detectors we study the dependence of detection efficiency on bias current, photon energy, and strip width and compare it with NbN SSPD. We observe non-linear current-energy dependence in MoNx SSPD and more pronounced plateaus in dependences of detection efficiency on bias current which we attribute to longer electronphonon interaction time. |
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| Notes |
Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1114 | ||
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