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Author | Anthore, A.; Pothier, H.; Esteve, D. | ||||
Title | Density of states in a superconductor carrying a supercurrent | Type | Journal Article | ||
Year | 2003 | Publication | Phys. Rev. Lett. | Abbreviated Journal | Phys. Rev. Lett. |
Volume | 90 | Issue | 12 | Pages | 127001 (1 to 4) |
Keywords | Usadel, superconducting nanowire | ||||
Abstract | We have measured the tunneling density of states (DOS) in a superconductor carrying a supercurrent or exposed to an external magnetic field. The pair correlations are weakened by the supercurrent, leading to a modification of the DOS and to a reduction of the gap. As predicted by the theory of superconductivity in diffusive metals, we find that this effect is similar to that of an external magnetic field. | ||||
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Notes | Recommended by Klapwijk | Approved | no | ||
Call Number | Serial | 924 | |||
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Author | Arutyunov, K. Y.; Ramos-Alvarez, A.; Semenov, A. V.; Korneeva, Y. P.; An, P. P.; Korneev, A. A.; Murphy, A.; Bezryadin, A.; Gol'tsman, G. N. | ||||
Title | Superconductivity in highly disordered NbN nanowires | Type | Journal Article | ||
Year | 2016 | Publication | Nanotechnol. | Abbreviated Journal | Nanotechnol. |
Volume | 27 | Issue | 47 | Pages | 47lt02 (1 to 8) |
Keywords | NbN nanowires | ||||
Abstract | The topic of superconductivity in strongly disordered materials has attracted significant attention. These materials appear to be rather promising for fabrication of various nanoscale devices such as bolometers and transition edge sensors of electromagnetic radiation. The vividly debated subject of intrinsic spatial inhomogeneity responsible for the non-Bardeen-Cooper-Schrieffer relation between the superconducting gap and the pairing potential is crucial both for understanding the fundamental issues of superconductivity in highly disordered superconductors, and for the operation of corresponding nanoelectronic devices. Here we report an experimental study of the electron transport properties of narrow NbN nanowires with effective cross sections of the order of the debated inhomogeneity scales. The temperature dependence of the critical current follows the textbook Ginzburg-Landau prediction for the quasi-one-dimensional superconducting channel I c approximately (1-T/T c)(3/2). We find that conventional models based on the the phase slip mechanism provide reasonable fits for the shape of R(T) transitions. Better agreement with R(T) data can be achieved assuming the existence of short 'weak links' with slightly reduced local critical temperature T c. Hence, one may conclude that an 'exotic' intrinsic electronic inhomogeneity either does not exist in our structures, or, if it does exist, it does not affect their resistive state properties, or does not provide any specific impact distinguishable from conventional weak links. | ||||
Address | National Research University Higher School of Economics, Moscow Institute of Electronics and Mathematics,109028, Moscow, Russia. P L Kapitza Institute for Physical Problems RAS, Moscow, 119334, Russia | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0957-4484 | ISBN | Medium | ||
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Notes | PMID:27782000 | Approved | no | ||
Call Number | Serial | 1332 | |||
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Author | Arutyunov, K. Y.; Ramos-Álvarez, A.; Semenov, A. V.; Korneeva, Y. P.; An, P. P.; Korneev, A. A.; Murphy, A.; Bezryadin, A.; Gol’tsman, G. N. | ||||
Title | Quasi-1-dimensional superconductivity in highly disordered NbN nanowires | Type | Miscellaneous | ||
Year | 2016 | Publication | arXiv | Abbreviated Journal | |
Volume | Issue | Pages | |||
Keywords | narrow NbN nanowires, BCS | ||||
Abstract | The topic of superconductivity in strongly disordered materials has attracted a significant attention. In particular vivid debates are related to the subject of intrinsic spatial inhomogeneity responsible for non-BCS relation between the superconducting gap and the pairing potential. Here we report experimental study of electron transport properties of narrow NbN nanowires with effective cross sections of the order of the debated inhomogeneity scales. We find that conventional models based on phase slip concept provide reasonable fits for the shape of the R(T) transition curve. Temperature dependence of the critical current follows the text-book Ginzburg-Landau prediction for quasi-one-dimensional superconducting channel Ic~(1-T/Tc)^3/2. Hence, one may conclude that the intrinsic electronic inhomogeneity either does not exist in our structures, or, if exist, does not affect their resistive state properties. | ||||
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Notes | Duplicated as 1332 | Approved | no | ||
Call Number | Serial | 1338 | |||
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Author | Bell, Matthew; Sergeev, Andrei; Goltsman, Gregory; Bird, Jonathan; Verevkin, Aleksandr | ||||
Title | Transition-edge sensors based on superconducting nanowires | Type | Abstract | ||
Year | 2006 | Publication | Proc. APS March Meeting | Abbreviated Journal | Proc. APS March Meeting |
Volume | Issue | Pages | B38.00001 | ||
Keywords | NbN nanowire TES | ||||
Abstract | We present our experimental study of superconducting NbN nanowire-based sensor. The responsivity of the sensor is strongly affected by the superconducting transition width of the nanostructure, which, in turn, is determined by the phase slip centers (PCSs) dynamics. The fluctuations and noise properties of the sensor are also discussed, as well as the devices' behavior at high magnetic fields. The ultimate performance of the sensor and prospects of the devices will be discussed, as well. | ||||
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Notes | Approved | no | |||
Call Number | Serial | 1455 | |||
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Author | Dauler, Eric; Kerman, Andrew; Robinson, Bryan; Yang, Joel; Voronov, Boris; Goltsman, Gregory; Hamilton, Scott; Berggren, Karl | ||||
Title | Photon-number-resolution with sub-30-ps timing using multi-element superconducting nanowire single photon detectors | Type | Journal Article | ||
Year | 2009 | Publication | J. Modern Opt. | Abbreviated Journal | J. Modern Opt. |
Volume | 56 | Issue | 2 | Pages | 364-373 |
Keywords | PNR SSPD; SNSPD; photon-number-resolution; superconducting nanowire single photon detector; timing jitter; system detection efficiency | ||||
Abstract | A photon-number-resolving detector based on a four-element superconducting nanowire single photon detector is demonstrated to have sub-30-ps resolution in measuring the arrival time of individual photons. This detector can be used to characterize the photon statistics of non-pulsed light sources and to mitigate dead-time effects in high-speed photon counting applications. Furthermore, a 25% system detection efficiency at 1550 nm was demonstrated, making the detector useful for both low-flux source characterization and high-speed photon-counting and quantum communication applications. The design, fabrication and testing of this detector are described, and a comparison between the measured and theoretical performance is presented. | ||||
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Notes | Approved | no | |||
Call Number | RPLAB @ gujma @ | Serial | 700 | ||
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Author | de Lara, D. Perez; Ejrnaes, M.; Casaburi, A.; Lisitskiy, M.; Cristiano, R.; Pagano, S.; Gaggero, A.; Leoni, R.; Golt’sman, G.; Voronov, B. | ||||
Title | Feasibility investigation of NbN nanowires as detector in time-of-flight mass spectrometers for macromolecules of interest in biology (proteins) | Type | Journal Article | ||
Year | 2008 | Publication | J. Low Temp. Phys. | Abbreviated Journal | J. Low Temp. Phys. |
Volume | 151 | Issue | 3-4 | Pages | 771-776 |
Keywords | NbN SSPD, SNSPD, nanowires | ||||
Abstract | We are investigating the possibility of using NbN nanowires as detectors in time-of-flight mass spectrometers for investigation of macromolecules of interest in biology (proteins). NbN nanowires could overcome the two major drawbacks encountered so far by cryogenic detectors, namely the low working temperature in the mK region and the slow temporal response. In fact, NbN nanowires can work at 5 K and the response time is at least a factor 10–100 better than that of other cryogenic detectors. We present a feasibility study based on a numerical code to calculate the response of a NbN nanowire. The parameter space is investigated at different energies from IR to macromolecules (i.e. from eV to keV) in order to understand if larger value of film thickness and width can be used for the keV energy region. We also present preliminary experimental results of irradiation with X-ray photons of NbN to simulate the effect of macromolecules of the same energy. | ||||
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ISSN | 0022-2291 | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Serial | 1410 | |||
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Author | Goltsman, G. | ||||
Title | Quantum-photonic integrated circuits | Type | Conference Article | ||
Year | 2019 | Publication | Proc. IWQO | Abbreviated Journal | Proc. IWQO |
Volume | Issue | Pages | 22-23 | ||
Keywords | WSSPD, waveguide SSPD, SNSPD, quantum optics, integrated optics, superconducting nanowire single-photon detector | ||||
Abstract | We show the design, a history of development as well as the most successful and promising approaches for QPICs realization based on hybrid nanophotonic-superconducting devices, where one of the key elements of such a circuit is a waveguide integrated superconducting single-photon detector (WSSPD). The potential of integration with fluorescent molecules is discussed also. | ||||
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Notes | Approved | no | |||
Call Number | Serial | 1287 | |||
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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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Notes | 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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Author | Ovchinnikov, Yu. N.; Varlamov, A. A. | ||||
Title | Fluctuation-dissipative phenomena in a narrow superconducting channel carrying current below critical | Type | Journal Article | ||
Year | 2009 | Publication | arXiv | Abbreviated Journal | |
Volume | 0910.2659v1 | Issue | Pages | 1-4 | |
Keywords | superconducting nanowire, resistance calculation | ||||
Abstract | The theory of current transport in a narrow superconducting channel accounting for thermal fluctuations is developed. These fluctuations result in the appearance of small but finite dissipation in the sample. The value of corresponding voltage is found as the function of temperature (close to transition temperature) and arbitrary bias current. It is demonstrated that the value of the activation energy (exponential factor in the Arrenius law) when current approaches to the critical one is proportional to (1-J/Jc)^(5/4). This result is in concordance with the one for the affine phenomenon of the Josephson current decay due to the thermal phase fluctuations, where the activation energy proportional (1-J/J_c)^(3/2)(the difference in the exponents is related to the additional current dependence of the order parameter). Found dependence of the activation energy on current explains the enormous discrepancy between the theoretically predicted before and the experimentally observed broadening of the resistive transition. | ||||
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Notes | arXiv:0910.2659v1; 4 pages, 3 figures | Approved | no | ||
Call Number | Serial | 931 | |||
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