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Корнеев, А. А.; Окунев, О. В.; Чулкова, Г. М.; Смирнов, К. В.; Милостная, И. И.; Минаева, О. В.; Корнеева, Ю. П.; Каурова, Н. С.; Воронов, Б. М.; Гольцман, Г. Н. |
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Спонтанные и фотоиндуцированные резистивные состояния в узких сверхпроводящих NbN полосках |
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2015 |
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NbN films |
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Монография посвящена актуальной проблеме современной фотоники: разработке высокочувствительных и быстродействующих сверхпроводниковых однофотонных детекторов на основе тонкой пленки NbN. В работе исследуются неравновесные процессы, протекающие в тонкой сверхпроводящей пленке после поглощения инфракрасного фотона и приводящие к возникновению резистивного состояния. На этих процессах основан механизм фотоотклика исследуемого в работе однофотонного детектора. В частности, исследуются зависимости квантовой эффективности и скорости темнового счета от геометрических параметров детектора: толщины пленки, ширины полоски, а также от величины транспортного тока детектора. Монография предназначена для студентов старших курсов, аспирантов и начинающих исследователей, работающих в области сверхпроводниковой наноэлектроники и радиофизики. |
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Москва |
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МПГУ |
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978-5-4263-0269-3 |
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УДК: 535; Число страниц: 108 |
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1812 |
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Il'in, K.; Siegel, M.; Semenov, A.; Engel, A.; Hübers, H.-W.; Hollmann, E.; Gol'tsman, G.; Voronov, B. |
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Title |
Thickness dependence of superconducting properties of ultrathin Nb and NbN films |
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Conference Article |
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2004 |
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AKF-Frühjahrstagung |
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Nb, NbN films, has potential plagiarism |
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Berlin-Adlershof |
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1503 |
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Gao, J. R.; Hajenius, M.; Tichelaar, F. D.; Klapwijk, T. M.; Voronov, B.; Grishin, E.; Gol’tsman, G.; Zorman, C. A.; Mehregany, M. |
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Monocrystalline NbN nanofilms on a 3C-SiC∕Si substrate |
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Journal Article |
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2007 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
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91 |
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6 |
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062504 (1 to 3) |
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NbN films, nanofilms |
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The authors have realized NbN (100) nanofilms on a 3C-SiC (100)/Si(100) substrate by dc reactive magnetron sputtering at 800°C. High-resolution transmission electron microscopy (HRTEM) is used to characterize the films, showing a monocrystalline structure and confirming epitaxial growth on the 3C-SiC layer. A film ranging in thickness from 3.4to4.1nm shows a superconducting transition temperature of 11.8K, which is the highest reported for NbN films of comparable thickness. The NbN nano-films on 3C-SiC offer a promising alternative to improve terahertz detectors. For comparison, NbN nanofilms grown directly on Si substrates are also studied by HRTEM.
The authors acknowledge S. V. Svetchnikov at National Centre for HRTEM at Delft, who prepared the specimens for HRTEM inspections. This work was supported by the EU through RadioNet and INTAS. |
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0003-6951 |
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1425 |
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Titova, N. A.; Baeva, E. M.; Kardakova, A. I.; Goltsman, G. N. |
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Fabrication of NbN/SiNx:H/SiO2 membrane structures for study of heat conduction at low temperatures |
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Conference Article |
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2020 |
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J. Phys.: Conf. Ser. |
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J. Phys.: Conf. Ser. |
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1695 |
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012190 |
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NbN films, insulating membrane |
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Here we report on the development of NbN/SiNx:H/SiO2-membrane structures for investigation of the thermal transport at low temperatures. Thin NbN films are known to be in the regime of a strong electron-phonon coupling, and one can assume that the phononic and electronic baths in the NbN are in local equilibrium. In such case, the cooling of the NbN-based devices strongly depends on acoustic matching to the substrate and substrate thermal characteristics. For the insulating membrane much thicker than the NbN film, our preliminary results demonstrate that the membrane serves as an additional channel for the thermal relaxation of the NbN sample. That implies a negligible role of thermal boundary resistance of the NbN-SiNx:H interface in comparison with the internal thermal resistance of the insulating membrane. |
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1742-6588 |
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1165 |
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Manova, N. N.; Simonov, N. O.; Korneeva, Y. P.; Korneev, A. A. |
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Developing of NbN films for superconducting microstrip single-photon detector |
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Conference Article |
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2020 |
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J. Phys.: Conf. Ser. |
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J. Phys.: Conf. Ser. |
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1695 |
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012116 (1 to 5) |
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NbN SSPD, SNSPD, NbN films |
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We optimized NbN films on a Si substrate with a buffer SiO2 layer to produce superconducting microstrip single-photon detectors with saturated dependence of quantum efficiency (QE) versus normalized bias current. We varied thickness of films and observed the maximum QE saturation for device based on the thinner film with the lowest ratio RS300/RS20. |
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