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Author Gershenson, M. E.; Gong, D.; Sato, T.; Karasik, B. S.; Sergeev, A. V.
Title Millisecond electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures Type Journal Article
Year 2001 Publication Appl. Phys. Lett. Abbreviated Journal
Volume 79 Issue Pages 2049-2051
Keywords HEB detector, FIR, far infrared
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Call Number RPLAB @ s @ heb_eph_interaction_Gershenzon Serial 315
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Author Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V.
Title Heating of electrons in resistive state of superconducting films. Detectors, mixers and switches Type Conference Article
Year 1992 Publication Progress in High Temperature Superconductivity Abbreviated Journal Progress in High Temperature Superconductivity
Volume 32 Issue Pages 190-195
Keywords superconducting films, heating of electrons
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Area Expedition Conference International Conference on High Temperature Superconductivity and Localization Phenomena , Moscow, Russia , 11 – 15 May 1991
Notes https://books.google.co.kr/books?hl=en&lr=&id=uCI0DwAAQBAJ&oi=fnd&pg=PA190&ots=z7WGjXYWr4&sig=TQ6G6dKsmcj4faYe1ZLw_BFmps8 Approved no
Call Number Serial 1666
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Author Aksaev, E. E.; Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V.
Title Prospects for using high-temperature superconductors to create electron bolometers Type Journal Article
Year 1989 Publication Pisma v Zhurnal Tekhnicheskoi Fiziki Abbreviated Journal Pisma v Zhurnal Tekhnicheskoi Fiziki
Volume 15 Issue 14 Pages 88-93
Keywords HTS HEB
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Language Russian Summary Language Original Title
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ISSN 0320-0116 ISBN Medium
Area Expedition Conference
Notes Перспективы применения высокотемпературных сверхпроводников для создания электронных болометров Approved no
Call Number Serial 1693
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Author Gershenzon, E.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V.
Title Heating of quasiparticles in a superconducting film in the resistive state Type Journal Article
Year 1981 Publication JETP Lett. Abbreviated Journal JETP Lett.
Volume 34 Issue 5 Pages 268-271
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Call Number Serial 1716
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Author Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V.
Title Nonselective effect of electromagnetic radiation on a superconducting film in the resistive state Type Journal Article
Year 1982 Publication JETP Lett. Abbreviated Journal JETP Lett.
Volume 36 Issue 7 Pages 296-299
Keywords HEB
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Notes Неселективное воздействие электромагнитного излучения на сверхпроводящую пленку в резистивном состоянии Approved no
Call Number Serial 1717
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Author Il’in, K.S.; Ptitsina, N.G.; Sergeev, A.V.; Gol’tsman, G.N.; Gershenzon, E.M.; Karasik, B.S.; Pechen, E.V.; Krasnosvobodtsev, S.I.
Title Interrelation of resistivity and inelastic electron-phonon scattering rate in impure NbC films Type Journal Article
Year 1998 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 57 Issue 24 Pages 15623-15628
Keywords NbC films
Abstract (up) A complex study of the electron-phonon interaction in thin NbC films with electron mean free path l=2–13nm gives strong evidence that electron scattering is significantly modified due to the interference between electron-phonon and elastic electron scattering from impurities. The interference T2 term, which is proportional to the residual resistivity, dominates over the Bloch-Grüneisen contribution to resistivity at low temperatures up to 60 K. The electron energy relaxation rate is directly measured via the relaxation of hot electrons heated by modulated electromagnetic radiation. In the temperature range 1.5–10 K the relaxation rate shows a weak dependence on the electron mean free path and strong temperature dependence ∼Tn, with the exponent n=2.5–3. This behavior is explained well by the theory of the electron-phonon-impurity interference taking into account the electron coupling with transverse phonons determined from the resistivity data.
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ISSN 0163-1829 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 1585
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Author Men’shchikov, E. M.; Gogidze, I. G.; Sergeev, A. V.; Elant’ev, A. I.; Kuminov, P. B.; Gol’tsman, G. N.; Gershenzon, E. M.
Title Superconducting fast detector based on the nonequilibrium inductance response of a film of niobium nitride Type Journal Article
Year 1997 Publication Tech. Phys. Lett. Abbreviated Journal Tech. Phys. Lett.
Volume 23 Issue 6 Pages 486-488
Keywords NbN KID
Abstract (up) A new type of fast detector is proposed, whose operation is based on the variation of the kinetic inductance of a superconducting film caused by nonequilibrium quasiparticles created by the electromagnetic radiation. The speed of the detector is determined by the rate of multiplication of photo-excited quasiparticles, and is nearly independent of the temperature, being less than 1 ps for NbN. Models based on the Owen-Scalapino scheme give a good description of the experimentally determined dependence of the power-voltage sensitivity of the detector on the modulation frequency. The lifetime of the quasiparticles is determined, and it is shown that the reabsorption of nonequilibrium phonons by the condensate has a substantial effect even in ultrathin NbN films 5 nm thick, and results in the maximum possible quantum yield. A low concentration of equilibrium quasiparticles and a high quantum yield result in a detectivity D*=1012 W−1·Hz1/2 at a temperature T=4.2 K and D*=1016 W−1·cm· Hz1/2 at T=1.6 K.
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ISSN 1063-7850 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 1593
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Author Gershenzon, E. M.; Gershenzon, M. E.; Goltsman, G. N.; Lulkin, A.; Semenov, A. D.; Sergeev, A. V.
Title Electron-phonon interaction in ultrathin Nb films Type Journal Article
Year 1990 Publication Sov. Phys. JETP Abbreviated Journal Sov. Phys. JETP
Volume 70 Issue 3 Pages 505-511
Keywords Nb films
Abstract (up) A study was made of the heating of electrons in normal resistive states of superconducting thin Nb films. The directly determined relaxation time of the resistance of a sample and the rise of the electron temperature were used to find the electron-phonon interaction time rep,, The dependence of rep, on the mean free path of electrons re,, a 1-'demonstrated, in agreement with the theoretical predictions, that the contribution of the inelastic scattering of electrons by impurities to the energy relaxation process decreased at low temperatures and the observed temperature dependence rep, a T 2 was due to a modification of the phonon spectrum in thin fllms.

1. Much new information on the electron-phonon interaction time?;,, in thin films of normal metals and superconductors has been published recently. This information has been obtained mainly as a result of two types of measurement. One includes experiments on weak electron localization investigated by the method of quantum interference corrections to the conductivity of disordered conductors, which can be used to find the relaxation time T, of the phase of the electron wave function. In the absence of the scattering of electrons by paramagnetic impurities the relaxation time T, is associated with the most effective process of energy relaxation: T;= TL+ rep;, where T,, is the electronelectron relaxation time. At low temperatures, when the dependence T; a T is exhibited by thin disordered films, the dominant channel is that of the electron-electron relaxation and there is a lower limit to the temperature range in which rep, can be investigated.
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Notes Approved no
Call Number Serial 241
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Author Il'in, K. S.; Karasik, B. S.; Ptitsina, N. G.; Sergeev, A. V.; Gol'tsman, G. N.; Gershenzon, E. M.; Pechen, E. V.; Krasnosvobodtsev, S. I.
Title Electron-phonon-impurity interference in thin NbC films: electron inelastic scattering time and corrections to resistivity Type Conference Article
Year 1996 Publication Czech. J. Phys. Abbreviated Journal Czech. J. Phys.
Volume 46 Issue S2 Pages 857-858
Keywords NbC films
Abstract (up) Complex study of transport properties of impure NbC films with the electron mean free pathl=0.6–13 nm show the crucial role of the electron-phonon-impurity interference (EPII). In the temperature range 20–70 K we found the interference correction to resistivity proportional to T2 and to the residual resistivity of the film. Using the comprehensive theory of EPII, we determine the electron coupling with transverse phonons and calculate the electron inelastic scattering time. Direct measurements of the inelastic electron scattering time using a response to a high-frequency amplitude modulated cw radiation agree well with the theory.
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0011-4626 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 1617
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Author Semenov, A. D.; Sergeev, A. V.; Kouminov, P.; Goghidze, I. G.; Heusinger, M. A.; Nebosis, R. S.; Gol'tsman, G. N.; Gershenzon, E. M.; Renk, K. F.
Title Transparency of YBCO film/substrate interfaces for thermal phonons determined by photoresponse measurements Type Conference Article
Year 1993 Publication Proc. 1st European Conf. on Appl. Supercond. Abbreviated Journal Proc. 1st European Conf. on Appl. Supercond.
Volume 2 Issue Pages 1443-1446
Keywords YBCO HTS detectors
Abstract (up) Direct measurements of the thermal boundary resistance were performed by means of the stationary method. In this approach the temperature of an electrically heated film is controlled by its dc resistance while an additional film on the same substrate is used as a thermometer monitoring substrate temperature. The temperature field in the substrate is then calculated to deduce the Kapitza temperature step at the interface between the heated strip and the substrate. The main statement of all afore-said papers is that experimental values of the thermal boundary resistance are too large to be explained by the acoustic mismatch model. In this paper we investigate transparency of YBaCuO film/substrate interfaces for thermal phonons by means of photoresponse measurements. We show that our data are in reasonable agreement with the acoustic mismatch theory.
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Publisher Place of Publication Editor Freyhardt, H. C.
Language Summary Language Original Title
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ISSN ISBN 3-88355-197-X Medium
Area Expedition Conference 1st European conference on applied superconductivity
Notes Approved no
Call Number Serial 1661
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Author Gousev, Y. P.; Semenov, A. D.; Gol'tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M.
Title Electron-phonon interaction in disordered NbN films Type Journal Article
Year 1994 Publication Phys. B Condens. Mat. Abbreviated Journal Phys. B Condens. Mat.
Volume 194-196 Issue Pages 1355-1356
Keywords NbN films
Abstract (up) Electron-phonon interaction time has been investigated in disordered films of NbN. A temperatures below 5.5 K tau_eph ~ T -1"6 which is attributed to the renormalisation of phonon spectrum in thin films.
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ISSN 0921-4526 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 1649
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Author Sergeev, A.; Mitin, V.
Title Electron-phonon interaction in disordered conductors: Static and vibrating scattering potentials Type Journal Article
Year 2000 Publication Phys. Rev. B. Abbreviated Journal Phys. Rev. B.
Volume 61 Issue 9 Pages 6041-6047
Keywords disordered conductors, scattering potential, electron-phonon interaction
Abstract (up) Employing the Keldysh diagram technique, we calculate the electron-phonon energy relaxation rate in a conductor with the vibrating and static δ-correlated random electron-scattering potentials. If the scattering potential is completely dragged by phonons, this model yields the Schmid’s result for the inelastic electron-scattering rate τ−1e−ph. At low temperatures the effective interaction decreases due to disorder, and τ−1e−ph∝T4l (l is the electron mean-free path). In the presense of the static potential, quantum interference of numerous scattering processes drastically changes the effective electron-phonon interaction. In particular, at low temperatures the interaction increases, and τ−1e−ph∝T2/l. Along with an enhancement of the interaction, which is observed in disordered metallic films and semiconducting structures at low temperatures, the suggested model allows us to explain the strong sensitivity of the electron relaxation rate to the microscopic quality of a particular film.
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0163-1829 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 307
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Author Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Sergeev, A. V.
Title Light-induced heating of electrons and the time of the inelastic electron-phonon scattering in the YBaCuO compound Type Journal Article
Year 1987 Publication JETP Lett. Abbreviated Journal JETP Lett.
Volume 46 Issue 6 Pages 285-287
Keywords YBCO HTS HEB
Abstract (up) For the first time, measurements have been made on the electron energy relaxation time due to the electron--phonon interaction in films of the YBaCuO superconductor. The results indicate a significant intensification of the electron--phonon interaction in this compound as compared with normal superconducting metals.
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Notes Approved no
Call Number Serial 1706
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Author Bell, M.; Kaurova, N.; Divochiy, A.; Gol'tsman, G.; Bird, J.; Sergeev, A.; Verevkin, A.
Title On the nature of resistive transition in disordered superconducting nanowires Type Journal Article
Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume 17 Issue 2 Pages 267-270
Keywords SSPD, SNSPD
Abstract (up) Hot-electron single-photon counters based on long superconducting nanowires are starting to become popular in optical and infrared technologies due to their ultimately high sensitivity and very high response speed. We investigate intrinsic fluctuations in long NbN nanowires in the temperature range of 4.2 K-20 K, i.e. above and below the superconducting transition. These fluctuations are responsible for fluctuation resistivity and also determine the noise in practical devices. Measurements of the fluctuation resistivity were performed at low current densities and also in external magnetic fields up to 5 T. Above the BCS critical temperature T co the resistivity is well described by the Aslamazov-Larkin (AL) theory for two-dimensional samples. Below T co the measured resistivity is in excellent agreement with the Langer-Ambegaokar-McCumber-Halperin (LAMH) theory developed for one-dimensional superconductors. Despite that our nanowires of 100 nm width are two-dimensional with respect to the coherence length, our analysis shows that at relatively low current densities the one-dimensional LAMH mechanism based on thermally induced phase slip centers dominates over the two-dimensional mechanism related to unbinding of vortex-antivortex pairs below the Berezinskii-Kosterlitz-Thouless transition.
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Series Volume Series Issue Edition
ISSN 1051-8223 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number Serial 1247
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Author Gershenzon, E. M.; Gol’tsman, G. N.; Sergeev, A.; Semenov, A. D.
Title Picosecond response of YBaCuO films to electromagnetic radiation Type Conference Article
Year 1990 Publication Proc. European Conf. High-Tc Thin Films and Single Crystals Abbreviated Journal Proc. European Conf. High-Tc Thin Films and Single Crystals
Volume Issue Pages 457-462
Keywords YBCO HTS detectors
Abstract (up) Radiation-induced change of the resistance was studied in the resistive state of YBaCuO films. Electron-phonon relaxation time T h was determmed from direct ep measurements and analysis of quasistationary electron heating. Temperature dependence of That TS 40 K was found to – ep be T h.. T'. The resul ts show that ep detectors with the response time of few picosecond at nitrogen temperature can be realized.
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Publisher Place of Publication Editor Gorzkowski, W.; Gutowski, M.; Reich, A.; Szymczak, H.
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Area Expedition Conference European Conference , Ustroń, Poland , 30 Sept – 4 Oct 1989
Notes Approved no
Call Number Serial 1695
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