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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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Title |
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. |
Abbreviated Journal |
J. Appl. Phys. |
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77 |
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8 |
Pages |
4064-4070 |
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Keywords |
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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Gershenzon, E. M.; Gol'tsman, G. N.; Potapov, V. D.; Sergeev, A. V. |
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Title |
Restriction of microwave enhancement of superconductivity in impure superconductors due to electron-electron interaction |
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Journal Article |
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Year |
1990 |
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Solid State Communications |
Abbreviated Journal |
Solid State Communications |
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75 |
Issue |
8 |
Pages |
639-641 |
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Keywords |
impure superconductors |
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Transition from microwave enhancement of supercurrent to superconductivity suppression is investigated in impure superconductors. It is demonstrated that the frequency range of the enhancement effect narrows with the decrease of the electron mean free path, l, and at l ⩽ 1 nm electron heating is observed in the whole frequency range. Dependences of frequency boundaries on l are explained by taking into account strong electron-electron interaction in impure metals. |
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0038-1098 |
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1687 |
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Воеводин, Е. И.; Гершензон, Е. М.; Гольцман, Г. Н.; Птицина, Н. Г. |
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Энергетический спектр мелких акцепторов в сильно одноосно деформированном Ge |
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1989 |
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Физика и техника полупроводников |
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Физика и техника полупроводников |
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23 |
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8 |
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1356-1361 |
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Ge, crystallography |
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Проведены исследования спектров фототермической ионизации мелких акцепторов (В, Аl) в Ge, предельно сжатом вдоль кристаллографической оси [100]. Из данных измерений с учетом теории построен энергетический спектр примесей. Показано, что энергии большого числа уровней четных и нечетных состояний хорошо соответствуют расчету, выполненному для примесей в анизотропном полупроводнике с параметром анизотропии γ=m∗⊥/m∗∥>1. |
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Russian |
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Duplicated as 1692 |
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1691 |
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Author |
Voevodin, E. I.; Gershenzon, E. M.; Goltsman, G. N.; Ptitsina, N. G. |
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Title |
Energy-spectrum of shallow acceptors in Ge deformed strongly by a uniaxial pressure |
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Year |
1989 |
Publication |
Sov. Phys. and Technics of Semiconductors |
Abbreviated Journal |
Sov. Phys. and Technics of Semiconductors |
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23 |
Issue |
8 |
Pages |
843-846 |
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Ge, crystallography |
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Abstract |
Проведены исследования спектров фототермической ионизации мелких акцепторов (В, Аl) в Ge, предельно сжатом вдоль кристаллографической оси [100]. Из данных измерений с учетом теории построен энергетический спектр примесей. Показано, что энергии большого числа уровней четных и нечетных состояний хорошо соответствуют расчету, выполненному для примесей в анизотропном полупроводнике с параметром анизотропии γ=m∗⊥/m∗∥>1. |
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Энергетический спектр мелких акцепторов в сильно одноосно деформированном Ge |
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1692 |
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Гершензон, Е. М.; Гольцман, Г. Н.; Елантьев, А. И.; Кагане, М. Л.; Мултановский, В. В.; Птицина, Н. Г. |
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Применение субмиллиметровой ЛОВ спектроскопии для определения химической природы и концентрации примесей в чистых полупроводниках |
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1983 |
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Физика и техника полупроводников |
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Физика и техника полупроводников |
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17 |
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8 |
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1430-1437 |
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BWO spectroscopy, pure semiconductors, residual impurities |
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Duplicated as 1714 |
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1712 |
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