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Karasik, B. S.; Zorin, M. A.; Milostnaya, I. I.; Elantev, A. I.; Gol’tsman, G. N.; Gershenzon, E. M. |
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Subnanosecond switching of YBaCuO films between superconducting and normal states induced by current pulse |
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Journal Article |
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Year |
1995 |
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J. Appl. Phys. |
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J. Appl. Phys. |
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77 |
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8 |
Pages |
4064-4070 |
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YBCO HTS switches |
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Abstract |
A study is reported of the current switching in high‐quality YBaCuO films deposited onto NdGaO3 and ZrO2 substrates between superconducting (S) and normal (N) states. The films 60–120 nm thick prepared by laser ablation were structured into single strips between gold contacts. The time dependence of the resistance after application of the voltage step to the film was monitored. Experiment performed within certain ranges of voltage amplitudes and temperatures has shown the occurrence of the fast stage (shorter than 400 ps) both in S‐N and N‐S transitions. A fraction of the film resistance changing within this stage in the S‐N transition increases with the current amplitude. A subnanosecond N‐S stage becomes more pronounced for shorter pulses. The fast switching is followed by the much slower change of resistance. The mechanism of switching is discussed in terms of the hot‐electron phenomena in YBaCuO. The contributions of other thermal processes (e.g., a phonon escape from the film, a heat diffusion in the film and substrate, a resistive domain formation) in the subsequent stage of the resistance dynamic have been also discussed. The basic limiting characteristics (average dissipated power, energy needed for switching, maximum repetition rate) of a picosecond switch which is proposed to be developed are estimated. |
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0021-8979 |
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1623 |
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Hans Ekstrom; Karasik, Boris S.; Kollberg, Erik L.; Sigfrid Yngvesson |
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Title |
Conversion gain and noise of niobium superconducting hot–electron–mixers |
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Journal Article |
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1995 |
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IEEE Trans. Appl. Supercond. |
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43 |
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4 |
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938-947 |
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Nb HEB mixers |
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254 |
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Kerr, A. R. |
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Some fundamental and practical limits on broadband matching tocapacitive devices, and the implications for SIS mixer design |
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1995 |
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IEEE Trans. Microw. Theory Techn. |
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43 |
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1 |
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2-13 |
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256 |
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de Lange, G.; Kuipers, J. J.; Klapwijk, T. M.; Panhuyzen, R. A.; van de Stadt, H.; de Graauw, M. W. M. |
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Title |
Superconducting resonator circuits at frequencies above the gap frequency |
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1995 |
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J. Appl. Phys. |
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77 |
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4 |
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1795-1804 |
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257 |
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Hesler, J. L.; Crowe, T. W.; Bradley, R. F.; Pan, S. K.; Chattopadhyay, G. |
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Title |
The design, construction and evaluation of a 585 GHz planar Schottky mixer |
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Conference Article |
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1995 |
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Proc. 6th Int. Symp. Space Terahertz Technol. |
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34-43 |
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Pasadena, Ca |
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259 |
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