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Gershenzon, E. M.; Orlova, S. L.; Orlov, L. A.; Ptitsina, N. G.; Rabinovich, R. I. |
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Title |
Intervalley cyclotron-impurity resonance of electrons in n-Ge |
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Journal Article |
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1976 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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24 |
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3 |
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125-128 |
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n-Ge, cyclotron-impurity resonance |
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Trifonov, A.; Tong, C.-Y. E.; Grimes, P.; Lobanov, Y.; Kaurova, N.; Blundell, R.; Goltsman, G. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Development of a silicon membrane-based multipixel hot electron bolometer receiver |
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Journal Article |
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2017 |
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IEEE Trans. Appl. Supercond. |
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IEEE Trans. Appl. Supercond. |
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27 |
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4 |
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1-5 |
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Multi-pixel, NbN HEB, silicon-on-insulator, horn array |
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We report on the development of a multipixel hot electron bolometer (HEB) receiver fabricated using silicon membrane technology. The receiver comprises a 2 × 2 array of four HEB mixers, fabricated on a single chip. The HEB mixer chip is based on a superconducting NbN thin-film deposited on top of the silicon-on-insulator (SOI) substrate. The thicknesses of the device layer and handling layer of the SOI substrate are 20 and 300 μm, respectively. The thickness of the device layer is chosen such that it corresponds to a quarter-wave in silicon at 1.35 THz. The HEB mixer is integrated with a bow-tie antenna structure, in turn designed for coupling to a circular waveguide, fed by a monolithic drilled smooth-walled horn array. |
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Zhang, X.; Lita, A. E.; Smirnov, K.; Liu, H. L.; Zhu, D.; Verma, V. B.; Nam, S. W.; Schilling, A. |
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Strong suppression of the resistivity near the superconducting transition in narrow microbridges in external magnetic fields |
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Journal Article |
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2020 |
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Phys. Rev. B |
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Phys. Rev. B |
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101 |
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6 |
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060508 (1 to 6) |
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MoSi, WSi films |
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We have investigated a series of superconducting bridges based on homogeneous amorphous WSi and MoSi films, with bridge widths w ranging from 2 to 1000μm and film thicknesses d∼4−6 and 100 nm. Upon decreasing the bridge widths below the respective Pearl lengths, we observe in all cases distinct changes in the characteristics of the resistive transitions to superconductivity. For each of the films, the resistivity curves R(B,T) separate at a well-defined and field-dependent temperature T∗(B) with decreasing the temperature, resulting in a dramatic suppression of the resistivity and a sharpening of the transitions with decreasing bridge width w. The associated excess conductivity in all the bridges scales as 1/w, which may suggest either the presence of a highly conducting region that is dominating the electric transport, or a change in the vortex dynamics in narrow enough bridges. We argue that this effect can only be observed in materials with sufficiently weak vortex pinning. |
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2469-9950 |
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1800 |
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Korneeva, Y. P.; Manova, N. N.; Florya, I. N.; Mikhailov, M. Y.; Dobrovolskiy, O. V.; Korneev, A. A.; Vodolazov, D. Y. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Different single-photon response of wide and narrow superconducting MoxSi1−x strips |
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Journal Article |
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2020 |
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Phys. Rev. Applied |
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Phys. Rev. Applied |
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13 |
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2 |
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024011 (1 to 7) |
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MoSi SSPD, SNSPD |
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The photon count rate (PCR) of superconducting single-photon detectors made of MoxSi1−x films shaped as a 2-μm-wide strip and a 115-nm-wide meander strip line is studied experimentally as a function of the dc biasing current at different values of the perpendicular magnetic field. For the wide strip, a crossover current Icross is observed, below which the PCR increases with an increasing magnetic field and above which it decreases. This behavior contrasts with the narrow MoxSi1−x meander, for which no crossover current is observed, thus suggesting different photon-detection mechanisms in the wide and narrow strips. Namely, we argue that in the wide strip the absorbed photon destroys superconductivity locally via the vortex-antivortex mechanism for the emergence of resistance, while in the narrow meander superconductivity is destroyed across the whole strip line, forming a hot belt. Accordingly, the different photon-detection mechanisms associated with vortices and the hot belt determine the qualitative difference in the dependence of the PCR on the magnetic field. |
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2331-7019 |
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1790 |
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Корнеева, Ю. П.; Михайлов, М. М.; Манова, Н. Н.; Дивочий, А. А.; Корнеев, А. А.; Вахтомин, Ю. Б.; Першин, Ю. П.; Гольцман, Г. Н. |
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Title |
Сверхпроводниковый однофотонный детектор на основе аморфных пленок MoSi |
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Conference Article |
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2014 |
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Труды XVIII международного симпозиума «Нанофизика и наноэлектроника» |
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1 |
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53-54 |
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MoSi SSPD |
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Нами были изготовлены и исследованы однофотонные детекторы на основе сверхпроводящих пленок Mo x Si 1-x двух различных стехиометрий: Mo 3 Si и Mo 4 Si. При температуре 1.7 К лучшие детекторы площадью 7 мкм*7 мкм на основе этих пленок продемонстрировали системную квантовую эффективность 18% при скорости темнового счета 10 с -1 на длине волны 1.2 мкм с использованием неполяризованного источника, длительность импульса – 6 нс, джиттер – 120 пс. |
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Нижний Новгород, Россия |
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Russian |
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1836 |
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