| Records |
| Author |
Blagosklonskaya, L. E.; Gershenzon, E. M.; Gol’tsman, G. N.; Elant’ev, A. I. |
Title  |
Effect of a strong magnetic field on the spectrum of donors in InSb |
Type |
Journal Article |
| Year |
1978 |
Publication |
Sov. Phys. Semicond. |
Abbreviated Journal |
Sov. Phys. Semicond. |
| Volume |
11 |
Issue |
12 |
Pages |
1395-1397 |
| Keywords |
InSb, spectrum of donors, strong magnetic field |
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1725 |
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Gershenzon, E. M.; Gol'tsman, G. N. |
| Title |
Effect of electromagnetic radiation on a superconductor in a magnetic field |
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Conference Article |
| Year |
1988 |
Publication |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
Abbreviated Journal |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
| Volume |
52 |
Issue |
3 |
Pages |
449-451 |
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| Abstract |
The effect of electromagnetic radiation on thin superconducting films of Nb with a large number of static defects is investigated experimentally for the case where the film is in the resistive state due to an applied magnetic field and transport current. The results obtained are found to be well described by a model of spatially homogeneous electron heating. It is noted that the results obtained here for Nb films are also valid for Al, NbN, and MoRe films. |
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Russian |
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0367-6765 |
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4th Vsesoiuznyi Seminar po Opticheskomu Detektirovaniiu Magnitnykh Rezonansov v Tverdykh Telakh, Tallin, Estonian SSR, Apr. 1987 |
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1702 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Riger, E. R. |
| Title |
Effect of electron-electron collisions on the trapping of free carriers by shallow impurity centers in germanium |
Type |
Journal Article |
| Year |
1986 |
Publication |
Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
| Volume |
64 |
Issue |
4 |
Pages |
889-897 |
| Keywords |
Ge, trapping of free carriers |
| Abstract |
Cascade Auger recombination of free carriers on shallow impurities in Ge is investigated under quasi-equilibrium conditions (T= 2-12 K) and in impurity breakdown. The Auger capture cross sections are found to be a,= 5. 10-l9 T-'n cm2 for donors and uip= 7- T-5p cm2 for acceptors. It is shown that in an isotropic semiconductor (p-Ge) ui is well described by the cascade-capture theory that takes into account only electron-electron collisions. In an anisotropic semiconductor ui is considerably larger (n-Ge, strongly uniaxially compressedp-Ge). Under impurity breakdown conditions the electron-electron collisions determine the lifetimes of the free carriers only in samples with appreciable density of the compensating impurity (Nk loi3 cmP3). |
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1707 |
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Blagosklonskaya, L. E.; Gershenzon, E. M.; Goltsman, G. N.; Elantev, A. I. |
| Title |
Effect of strong magnetic-field on spectrum of hydrogen-like admixtures in semiconductors |
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Conference Article |
| Year |
1978 |
Publication |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
Abbreviated Journal |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
| Volume |
42 |
Issue |
6 |
Pages |
1231-1234 |
| Keywords |
spectrum, semiconductors, admixtures, strong magnetic-field |
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Mezhdunarodnaya Kniga 39 Dimitrova Ul., 113095 Moscow, Russia |
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blagosklonskaya1978effect |
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1724 |
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Chulcova, G. M.; Ptitsina, N. G.; Gershenzon, E. M.; Gershenzon, M. E.; Sergeev, A. V. |
| Title |
Effect of the interference between electron-phonon and electron-impurity (boundary) scattering on resistivity Nb, Al, Be films |
Type |
Conference Article |
| Year |
1996 |
Publication |
Czech J. Phys. |
Abbreviated Journal |
Czech J. Phys. |
| Volume |
46 |
Issue |
S5 |
Pages |
2489-2490 |
| Keywords |
Al, Be, Nb films |
| Abstract |
The temperature dependence of the resistivity of thin Nb, Al, Be films has been studied over a wide temperature range 4-300 K. We have found that the temperature-dependent correction to the residual resistivity is well described by the sum of the Bloch-Grüneisen term and the term originating from the interference between electron-phonon and electron-impurity scattering. Study of the transport interference phenomena allows to determine electron-phonon coupling in disordered metals. The interference term is proportional to T2 and also to the residual resistivity and dominates over the Bloch-Grüneisen term at low temperatures (T<40 K). |
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0011-4626 |
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no |
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Serial |
1767 |
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Gershenzon, E. M.; Gol’tsman, G. N.; Gousev, Y. P.; Elant’ev, A. I.; Semenov, A. D. |
| Title |
Electromagnetic radiation mixer based on electron heating in resistive state of superconductive Nb and YBaCuO films |
Type |
Journal Article |
| Year |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
| Volume |
27 |
Issue |
2 |
Pages |
1317-1320 |
| Keywords |
YBCO, HTS, Nb HEB mixers |
| Abstract |
A theory of an electron-heating mixer which makes it possible to calculate all the characteristics of the device is developed. It is shown that positive conversion gain is possible for such a mixer in the millimeter to near-infrared wavelength range. The dynamic range and the optimum heterodyne power can be selected from a very wide interval by varying the mixing element volume. Measurements made for Nb within the frequency range of 120-750 GHz confirm the theory. The conversion loss obtained at T=1.6 K and normalized to the element reaches 0.3 dB in the intermediate frequency band of 40 MHz; the possible noise temperature is 50 K. The estimation of noise temperature and output band for YBaCuO at T=77 yields 200 K and more than 10 GHz, respectively. |
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1941-0069 |
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no |
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1681 |
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Verevkin, A. I.; Ptitsina, N. G.; Chulkova, G. M.; Gol'tsman, G. N.; Gershenzon, E. M.; Yngvesson, K. S. |
| Title |
Electron energy relaxation in a 2D channel in AlGaAs-GaAs heterostructures under quasiequilibrium conditions at low temperatures |
Type |
Journal Article |
| Year |
1995 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
61 |
Issue |
7 |
Pages |
591-595 |
| Keywords |
2DEG, AlGaAs/GaAs heterostructures |
| Abstract |
The energy relaxation time of 2D electrons, Te, has been measured under quasiequilibrium conditions in AlGaAs—GaAs heterojunctions over the temperature range T= 1.5—20 K. At T> 4 K, Te depends only weakly on the temperature, while at T< 4 K 7;'(T) there is a dependence fr; lNT. A linear dependence 7: 1 (T) in the Bloch—-Grfineisen temperature region (T< 5 K) is unambiguous evidence that a piezoacoustic mechanism of an electron—phonon interaction is predominant in the inelastic scattering of electrons. The values of T6 in this temperature range agree very accurately with theoretical results reported by Karpus [Sov. Phys. Semicond. 22 (1988)]. At higher temperatures, where scat—tering by deformation acoustic phonons becomes substantial, there is a significant discrepancy between the experimental and theoretical re-sults. |
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no |
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1624 |
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Ptitsina, N. G.; Chulkova, G. M.; Il’in, K. S.; Sergeev, A. V.; Pochinkov, F. S.; Gershenzon, E. M.; Gershenson, M. E. |
| Title |
Electron-phonon interaction in disordered metal films: The resistivity and electron dephasing rate |
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Journal Article |
| Year |
1997 |
Publication |
Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
| Volume |
56 |
Issue |
16 |
Pages |
10089-10096 |
| Keywords |
disordered metal films, electron-phonon interaction, electron dephasing rate, resistivity |
| Abstract |
The temperature dependence of the resistance of films of Al, Be, and NbC with small values of the electron mean free path l=1.5–10nm has been measured at 4.2–300 K. The resistance of all the films contains a T2 contribution that is proportional to the residual resistance; this contribution has been attributed to the interference between the elastic electron scattering and the electron-phonon scattering. Fitting the data to the theory of the electron-phonon-impurity interference (M. Yu. Reiser and A. V. Sergeev, Zh. Eksp. Teor. Fiz. 92, 224 (1987) [Sov. Phys. JETP 65, 1291 (1987)]), we obtain constants of interaction of the electrons with transverse phonons, and estimate the contribution of this interaction to the electron dephasing rate in thin films of Au, Al, Be, Nb, and NbC. Our estimates are in a good agreement with the experimental data on the inelastic electron-phonon scattering in these films. This indicates that the interaction of electrons with transverse phonons controls the electron-phonon relaxation rate in thin-metal films over a broad temperature range. |
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0163-1829 |
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no |
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1766 |
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Gousev, Y. P.; Semenov, A. D.; Gol'tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. |
| Title |
Electron-phonon interaction in disordered NbN films |
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Journal Article |
| Year |
1994 |
Publication |
Phys. B Condens. Mat. |
Abbreviated Journal |
Phys. B Condens. Mat. |
| Volume |
194-196 |
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Pages |
1355-1356 |
| Keywords |
NbN films |
| Abstract |
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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0921-4526 |
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no |
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1649 |
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Gol’tsman, G. N.; Semenov, A. D.; Sergeev, A. V.; Aksaev, E. E.; Gogidze, I. G.; Gershenzon, E. M. |
| Title |
Electron-phonon interaction in thin YBaCuO films and fast detectors |
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Conference Article |
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1993 |
Publication |
Phonon Scattering in Condensed Matter VII. Springer Series in Solid-State Sciences |
Abbreviated Journal |
Phonon Scattering in Condensed Matter VII. Springer Series in Solid-State Sciences |
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112 |
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184-185 |
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YBCO HTS detectors |
| Abstract |
The thin. YBaCuO film response to laser and submillimeter radiation demonstrates the picosecond nonequilibrium peak on the nanosecond bolometric background. Experimental data give an evidence for the spectral dependence of picosecond photoresponse probably due to a poor efficiency of electron multiplication processes. Presented results prove an availability of fast YBaCuO thin film detector. |
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Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
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no |
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1662 |
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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 |
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Journal Article |
| Year |
1990 |
Publication |
Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
| Volume |
70 |
Issue |
3 |
Pages |
505-511 |
| Keywords |
Nb films |
| Abstract |
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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241 |
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Karasik, B. S.; Il'in, K. S.; Ptitsina, N. G.; Gol'tsman, G. N.; Gershenzon, E. M.; Pechen', E. V.; Krasnosvobodtsev, S. I. |
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Electron-phonon scattering rate in impure NbC films |
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Abstract |
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1998 |
Publication |
NASA/ADS |
Abbreviated Journal |
NASA/ADS |
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Y35.08 |
| Keywords |
NbC films |
| Abstract |
The study of the electron-phonon interaction in thin (20 nm) NbC films with electron mean free path l=2-13 nm gives an evidence that electron scattering is significantly modified due to the interference between electron-phonon and elastic electron scattering from impurities. The interference ~T^2-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 T^n with the exponent n = 2.5-3. This behaviour is well explained 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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American Physical Society, Annual March Meeting, March 16-20, 1998 Los Angeles, CA |
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1591 |
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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 |
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Conference Article |
| Year |
1996 |
Publication |
Czech. J. Phys. |
Abbreviated Journal |
Czech. J. Phys. |
| Volume |
46 |
Issue |
S2 |
Pages |
857-858 |
| Keywords |
NbC films |
| Abstract |
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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0011-4626 |
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no |
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1617 |
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Sergeev, A.; Karasik, B. S.; Ptitsina, N. G.; Chulkova, G. M.; Il'in, K. S.; Gershenzon, E. M. |
| Title |
Electron–phonon interaction in disordered conductors |
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Journal Article |
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1999 |
Publication |
Phys. Rev. B Condens. Matter |
Abbreviated Journal |
Phys. Rev. B Condens. Matter |
| Volume |
263-264 |
Issue |
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Pages |
190-192 |
| Keywords |
disordered conductors, electron-phonon interaction |
| Abstract |
The electron–phonon interaction is strongly modified in conductors with a small value of the electron mean free path (impure metals, thin films). As a result, the temperature dependencies of both the inelastic electron scattering rate and resistivity differ significantly from those for pure bulk materials. Recent complex measurements have shown that modified dependencies are well described at K by the electron interaction with transverse phonons. At helium temperatures, available data are conflicting, and cannot be described by an universal model. |
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0921-4526 |
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1765 |
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Smirnov, K. V.; Ptitsina, N. G.; Vakhtomin, Y. B.; Verevkin, A. A.; Gol’tsman, G. N.; Gershenzon, E. M. |
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Energy relaxation of two-dimensional electrons in the quantum Hall effect regime |
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Journal Article |
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2000 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
71 |
Issue |
1 |
Pages |
31-34 |
| Keywords |
2DEG, GaAs/AlGaAs heterostructures |
| Abstract |
The mm-wave spectroscopy with high temporal resolution is used to measure the energy relaxation times τe of 2D electrons in GaAs/AlGaAs heterostructures in magnetic fields B=0–4 T under quasi-equilibrium conditions at T=4.2 K. With increasing B, a considerable increase in τe from 0.9 to 25 ns is observed. For high B and low values of the filling factor ν, the energy relaxation rate τ −1e oscillates. The depth of these oscillations and the positions of maxima depend on the filling factor ν. For ν>5, the relaxation rate τ −1e is maximum when the Fermi level lies in the region of the localized states between the Landau levels. For lower values of ν, the relaxation rate is maximum at half-integer values of τ −1e when the Fermi level is coincident with the Landau level. The characteristic features of the dependence τ −1e (B) are explained by different contributions of the intralevel and interlevel electron-phonon transitions to the process of the energy relaxation of 2D electrons. |
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0021-3640 |
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http://jetpletters.ru/ps/899/article_13838.shtml (“Энергетическая релаксация двумерных электронов в области квантового эффекта Холла”) |
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1559 |
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