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Kitaygorsky, Jennifer; Komissarov, I.; Jukna, A.; Minaeva, O.; Kaurova, N.; Divochiy, A.; Korneev, A.; Tarkhov, M.; Voronov, B.; Milostnaya, I.; Gol'tsman, G.; Sobolewski, R. |
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Title |
Fluctuations in two-dimensional superconducting NbN nanobridges and nanostructures meanders |
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Abstract |
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Year |
2007 |
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Proc. APS March Meeting |
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Proc. APS March Meeting |
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52 |
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1 |
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L9.00013 |
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We have observed fluctuations, manifested as sub-nanosecond to nanosecond transient, millivolt-amplitude voltage pulses, generated in two-dimensional NbN nanobridges, as well as in extended superconducting meander nanostructures, designed for single photon counting. Both nanobridges and nano-stripe meanders were biased at currents close to the critical current and measured in a range of temperatures from 1.5 to 8 K. During the tests, the devices were blocked from all incoming radiation by a metallic enclosure and shielded from any external magnetic fields. We attribute the observed spontaneous voltage pulses to the Kosterlitz-Thouless-type fluctuations, where the high enough applied bias current reduces the binding energy of vortex-antivortex pairs and, subsequently, thermal fluctuations break them apart causing the order parameter to momentarily reduce to zero, which in turn causes a transient voltage pulse. The duration of the voltage pulses depended on the device geometry (with the high-kinetic inductance meander structures having longer, nanosecond, pulses) while their rate was directly related to the biasing current as well as temperature. |
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1027 |
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Semenov, A.; Haas, P.; Ilin, K.; Hubers, H.; Siegel, M.; Engel, A.; Smirnov, A. |
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Title |
Energy resolution and sensitivity of a superconducting quantum detector |
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Journal Article |
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2007 |
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Phys. C: Supercond. |
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Phys. C: Supercond. |
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460-462 |
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1491-1492 |
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0921-4534 |
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535 |
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Проект Радиоастрон |
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2007 |
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russian |
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RPLAB @ s @ RADIOASTRON_site_rus |
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393 |
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Проект Миллиметрон |
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2007 |
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RPLAB @ s @ MILLIMETRON_site_rus |
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395 |
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Kardashev, N. S.; Andreyanov, V. V.; Gromov, V. D.; Buyakas, V. I.; Gvamichava, A. S.; Kotik, A. N.; Kurt, V. G.; Lazareva, G. S.; Mironova, E. N.; Myshonkova, N. V.; Slysh, V. I.; Trubnikov, A. G.; Vinogradov, I. S.; Troitsky, V. F.; Puryaev, D. T.; Usyukin, V. I. |
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Title |
The Millimetron project |
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Conference Article |
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Year |
2007 |
Publication |
Radioastronomical Tools and Techniques |
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111 |
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Kardashev, N. S.; Dagkesamanskii, S. A. |
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RPLAB @ s @ MILLIMETRON_Krdashev_2007 |
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398 |
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