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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DROKIN N. A., GANIEV S. M.
Заглавие : STOCHASTIC CURRENT INSTABILITY IN CDCR2SE4
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1988. - Vol. 30, Is. 2. - P568-570. - ISSN 0367-3294
Примечания : Cited References: 6
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Vasilyev A. D., Zwegintsev S. A., Петров, Михаил Иванович, Khrustalev B. P.
Заглавие : Peculiarities of the resistive state of the (Y,Lu)1Ba2Cu3O7-δ superconducting ceramics
Место публикации : Physica C. - 1988. - Vol. 156, Is. 2. - P.249-250. - ISSN 0921-4534
Ключевые слова (''Своб.индексиров.''): ceramic materials--oxides--current voltage characteristics--yttrium barium copper oxides--superconducting materials
Аннотация: The resistive state of the high-Tc superconducting ceramics (Y, Lu)1Ba2Cu3O7-δ has been investigated, a hysteresis instability has been discovered in the current-voltage characteristics (CVC) under a current density j ≈ 1.7 kA cm-2. © 1988.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Patrin G. S., PETRAKOVSKII G. A., KHARITONOV I. E.
Заглавие : Detection of magneto-dependent higher harmonics in htsc ceramics via the change of the low field microwave response under the passing of an alternating-current
Место публикации : Phys. Lett. A. - 1991. - Vol. 158, Is. 3-4. - P.167-170. - ISSN 0375-9601, DOI 10.1016/0375-9601(91)90921-T
Примечания : Cited References: 15
Предметные рубрики: BA-CU-O
GENERATION
STATE
Аннотация: The results of an investigation on the generation of higher harmonics under the passing of a low frequency current in HTSC ceramics by microwave spectroscopy methods are presented. It is found that the generation of only even harmonics occurs. The dependence of the signal upon the harmonic number and. as an example for the second harmonic, the temperature dependences of the microwave response parameters are discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Krivomazov S. N., Khrustalev B. P., Aleksandrov K. S.
Заглавие : A study of the hysteresis property of the current voltage characteristic in high-temperature superconductors
Место публикации : Solid State Commun. - 1992. - Vol. 82, Is. 6. - P.453-456. - ISSN 0038-1098, DOI 10.1016/0038-1098(92)90748-X
Примечания : Cited References: 21
Предметные рубрики: HIGH-TC SUPERCONDUCTORS
YBA2CU3O7-X
FILMS
Аннотация: Temperature measurements of current-voltage characteristics (CVC) of the (Y, Lu)1Ba2Cu3O7-delta high-temperature superconductor have been performed. Analysis of the data shows that CVC of HTSC is mainly formed by two mechanisms: the creep of the Abrikosov vortices inside the crystallites and the Andreev reflection of the carriers within the metal character boundary between the crystallites.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokin N. A., Ganiev S. M.
Заглавие : Static and dynamic characteristics of the bulk and contact electric resistivity in CDCR2SE4 under stochastic current instability
Место публикации : Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 7. - P.2122-2128. - ISSN 0367-3294
Примечания : Cited References: 21
Предметные рубрики: OSCILLATIONS
CHAOS
GE
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Doroshenko A. P.
Заглавие : Mechanically loaded magnetic system with permanent azimuthal and variable axial current densities
Место публикации : Zhurnal Tek. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 65, Is. 8. - P.156-165. - ISSN 0044-4642
Примечания : Cited References: 13
Предметные рубрики: SOLENOIDS
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Balaev D. A., Шайхутдинов, Кирилл Александрович, Khrustalev B. P., Aleksandrov K. S.
Заглавие : Critical current in composites consisting of a high-temperature superconductor and a semiconductor as a function of the carrier concentration
Место публикации : Doklady Physics. - 1996. - Vol. 41, Is. 2. - P.59-61. - ISSN 1028-3358
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bulgakov E. N., Sadreev A. F.
Заглавие : Current-voltage characteristics of the resonant tunnelling double-barrier structure under time-periodical perturbation
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 1996. - Vol. 8, Is. 45. - P.8869-8887. - ISSN 0953-8984, DOI 10.1088/0953-8984/8/45/020
Примечания : Cited References: 38
Предметные рубрики: SEMICONDUCTOR DOUBLE-BARRIER
OSCILLATING QUANTUM-WELL
DEPENDENT TRANSPORT
INFRARED-RADIATION
TUNNELING TIMES
HETEROSTRUCTURES
TRANSMISSION
MODEL
FREQUENCIES
COHERENT
Аннотация: We consider a typical semiconductor resonant tunnelling GaAs/AlGaAs/GaAs nanostructure which forms a double-barrier potential with quasienergy levels corresponding to transition frequencies in the infrared and microwave regions. Two types of dynamical perturbation of the heterostructure in the form V-1(x, t) = V(1)x cos Omega t and V-2(t) = V-2 cos Omega t are considered. We analyse numerically a reconstruction of the electron transmission through the heterostructure and the current-voltage characteristics (IVC) under the influence of these dynamical perturbations. Both weak and strong perturbations are considered. We investigate the dependences of the transmission on the electron energy and the frequency of the external field with the main accent on the case where a frequency of the perturbation is tuned to a transition between quasienergies of the double-barrier structure. it is found that these resonant phenomena give rise to new peaks and dips in the IVC. In particular, it is shown that the dipole type of perturbation V-1(x, t) gives rise to a Rabi splitting of the transmission peaks and under certain conditions to a Rabi splining of the IVC peaks and dips. We demonstrate that dynamical perturbation may induce a direct current opposite to the direction of the applied voltage, and that this phenomenon takes the form of a sharp dip which has a resonant origin. It is observed that the dipole type of perturbation V-1(x, t) of laser radiation is more effective for tuning the IVC than the first perturbation V-2(t). Also absorption and emission of energy by an electron transmitted through the DBRTS are considered.
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Вид документа :
Шифр издания :
Автор(ы) : Петров, Михаил Иванович, Balaev D. A., Ospishchev S. V., Шайхутдинов, Кирилл Александрович, Khrustalev B. P., Aleksandrov K. S.
Заглавие : Critical currents in bulk Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 composites
Место публикации : Physics Letters, Section A: General, Atomic and Solid State Physics. - 1997. - Vol. 237, Is. 1-2. - P.85-89
Предметные рубрики: HIGH-TC-SUPERCONDUCTORS
WEAK LINKS
JUNCTIONS
Ключевые слова (''Своб.индексиров.''): bulk composites--critical current density--network of weak s-n-s links--ybacuo + bapbo3--ybacuo+bapbo3 bulk composites--network of weak s-n-s links--critical current density
Аннотация: Bulk composites Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 with BaPbO3 volume content of 0-60% have been prepared. Temperature dependences of resistance and critical current density Jc(T) are presented. The best agreement of experimental Jc(T) with theory has been reached for the Gunsenheimer-Schussler-Kummel consideration of superconductor-normal metal-superconductor (S-N-S) junctions in the "clean" limit. В© 1997 Elsevier Science B.V.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Ospishchev S. V., Shaihutdinov K. A., Khrustalev B. P., Aleksandrov K. S.
Заглавие : Critical currents in bulk Y3/4Lu1/4Ba2Cu3O7+BaPbO3 composites
Место публикации : Phys. Lett. A. - 1997. - Vol. 237, Is. 1-2. - P.85-89. - ISSN 0375-9601, DOI 10.1016/S0375-9601(97)00694-4
Примечания : Cited References: 24
Предметные рубрики: HIGH-TC-SUPERCONDUCTORS
WEAK LINKS
JUNCTIONS
Ключевые слова (''Своб.индексиров.''): ybacuo+bapbo3 bulk composites--network of weak s-n-s links--critical current density
Аннотация: Bulk composites Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 with BaPbO3 volume content of 0-60% have been prepared. Temperature dependences of resistance and critical current density J(c)(T) are presented. The best agreement of experimental J(c)(T) with theory has been reached for the Gunsenheimer-Schussler-KUmmel consideration of superconductor-normal metal-superconductor (S-N-S) junctions in the "clean" limit. (C) 1997 Elsevier Science B.V.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Doroshenko A. P.
Заглавие : Current distribution in a single-ply coil with conducting "insulation"
Место публикации : Tech. Phys.: AMER INST PHYSICS, 1997. - Vol. 42, Is. 11. - P1329-1332. - ISSN 1063-7842, DOI 10.1134/1.1258871
Примечания : Cited References: 14
Аннотация: A coil made of a continuous rectangular conductor in the form of a single-layer cylindrical helix is analyzed to identify methods of improving the mechanical strength and energy efficiency of resistive systems for producing high magnetic fields with quasi-force-free windings. A characteristic feature of this helix is that the interturn insulation is replaced by a conductor of higher resistivity. An analysis is made of the direction of the resultant current density vector as a function of the ratio of the resistivities of the conductors and the winding angle. It is shown that in principle, the direction of this vector may be arbitrarily defined, by suitably selecting the resistivities of the conductors. In this case, the winding angle may be arbitrarily small. It is demonstrated that these helices will have a high mechanical strength, and when used in quasi-force-free windings they can appreciably reduce the axial current density, which helps to minimize the mechanical stresses and thereby improve the energy efficiency. (C) 1997 American Institute of Physics. [S1063-7842(97)01811-4].
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Shaikhutdinov K. A., Khrustalev B. P., Aleksandrov K. S.
Заглавие : Transport properties of composites high temperature superconductor + semiconductor with different carrier concentration
Место публикации : Physica C-Superconductivity and its Applications. - 1997. - Vol. 282, Is. PART 4. - P.2449-2450. - ISSN 0921-4534
Ключевые слова (''Своб.индексиров.''): carrier concentration--critical current density (superconductivity)--high temperature superconductors--semiconductor materials--thermal effects--transport properties--superconductor semiconductor superconductor junctions--composite materials
Аннотация: Composites HTSC + semiconductor with different carrier concentrations were prepared as a model of Josephson type contacts. Experimental temperature dependences of the critical current density Jc(T) in the composites are presented. The best congruence of experiment with theory was reached for the Schussler-Kummel consideration of Andreev scattering in S-Sm-S (S-superconductor, Sm-semiconductor) junctions.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Ospishchev S. V., Shaikhutdinov K. A., Khrustalev B. P., Aleksandrov K. S.
Заглавие : Characteristics of current flow in composites made from a high-temperature superconductor and the low-temperature superconducting metal oxide Ba(PbBi)O-3
Место публикации : Phys. Solid State: American Institute of Physics, 1997. - Vol. 39, Is. 3. - P.362-368. - ISSN 1063-7834, DOI 10.1134/1.1130134
Примечания : Cited References: 21
Предметные рубрики: BAPB1-XBIXO3 SYSTEM
YBA2CU3O7-DELTA
Аннотация: Composites are prepared from a high-temperature superconductor with the 1-2-3 structure and the low-temperature oxide BaPb3/4Bi1/4O3 with various volume concentrations of the high-temperature and low-temperature superconductors. The temperature dependences of the electrical resistivities and critical current densities of the composites are measured. It is shown experimentally that these composites comprise a synthetically created network of Josephson weak links (with a specified degree of coupling). (C) 1997 American Institute of Physics.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Ovchinnikov S. G., Balaev D. A., Kirko V. I.
Заглавие : Short-circuit current limiter utilizing a high-T-c superconductor
Разночтения заглавия :авие SCOPUS: Short-circuit current limiter utilizing a high-T(c) superconductor
Место публикации : Tech. Phys.: AMER INST PHYSICS, 1998. - Vol. 43, Is. 10. - P1255-1256. - ISSN 1063-7842, DOI 10.1134/1.1259166
Примечания : Cited References: 6
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
Аннотация: Experimental data are given on a prototype short-circuit current limiter utilizing a polycrystalline high-T-c superconductor of composition Y1Ba2Cu3O7-delta. The limiter comprises a series-connected de circuit element immersed in liquid nitrogen. To improve the efficiency, a polycrystalline high-T-c superconductor having an S-shaped current-voltage characteristic is used as the current limiter. (C) 1998 American Institute of Physics. [S1063-7842(98)02410-6].
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Cannon E. H., McKinney J. C., Kusmartsev F. V., Campbell D. K.
Заглавие : Spontaneous dc current generation in a resistively shunted semiconductor superlattice driven by a terahertz field
Место публикации : Phys. Rev. Lett.: AMERICAN PHYSICAL SOC, 1998. - Vol. 80, Is. 12. - P2669-2672. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.80.2669
Примечания : Cited References: 21
Предметные рубрики: DYNAMIC LOCALIZATION
BLOCH OSCILLATIONS
ELECTRIC-FIELD
THZ-FIELD
PENDULUM
CHAOS
TIME
SUPPRESSION
SYSTEMS
Аннотация: We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we determine numerically a range of amplitude and frequency of the ac field for which a de bias and current are generated spontaneously and show that this region is likely accessible to current experiments. Our simulations reveal that the Bloch frequency corresponding to the spontaneous de bias is approximately an integer multiple of the ac field frequency.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Erementchouk M. V., Kusmartsev F. V.
Заглавие : Direct-current generation due to wave mixing in semiconductors
Место публикации : Europhys. Lett. - 1999. - Vol. 47, Is. 5. - P.595-600. - ISSN 0295-5075, DOI 10.1209/epl/i1999-00430-0
Примечания : Cited References: 34
Предметные рубрики: BLOCH OSCILLATOR
SUPERLATTICES
PHOTOCURRENT
TRANSPORT
FREQUENCY
FIELD
RECTIFIERS
EMISSION
CHAOS
GAAS
Аннотация: We describe an effect of the generation of direct current which may arise in semiconductors or semiconductor microstructures due to a mixing of coherent electromagnetic radiations of commensurate frequencies. The effect is, in essence, due to a nonparabolicity of the electron energy bands and is stronger in systems where this nonparabolicity is greater. We have made exact calculations in the framework of the Kane model, applicable to narrow-gap semiconductors and the tight-binding model which we employ for a description of a semiconductor superlattice.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fransson J., Eriksson O., Johansson B., Sandalov I. S.
Заглавие : On the non-orthogonality problem in the description of quantum devices
Коллективы : International Conference on Nonequilibrium Carrier Dynamics in Semiconductors
Место публикации : Physica B/ International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (11 ; 1999 ; July ; 19-23 ; Kyoto, Japan). - 1999. - Vol. 272, Is. 1-4. - P.28-30. - ISSN 0921-4526, DOI 10.1016/S0921-4526(99)00343-9
Примечания : Cited References: 8
Предметные рубрики:
Ключевые слова (''Своб.индексиров.''): non-orthogonality--current--tunneling--correlation methods--electric contacts--electric currents--electron energy levels--electron tunneling--equations of motion--green's function--mathematical operators--matrix algebra--hubbard operators--potential barriers--tunneling currents--semiconductor quantum dots
Аннотация: An approach which allows to include the corrections from non-orthogonality of electron states in contacts and quantum dots is developed. Comparison of the energy levels and charge distributions of electrons in 1D quantum dot (QD) in equilibrium, obtained within orthogonal (OR) and non-orthogonal representations (NOR), with the exact ones shows that the NOR provides a considerable improvement, for levels below the top of barrier. The approach is extended to non-equilibrium states. A derivation of the tunneling current through a single potential barrier is performed using equations of motion for correlation functions. A formula for transient current derived by means of the diagram technique for Hubbard operators is given for the problem of QD with strongly correlated electrons interacting with electrons in contacts. The non-orthogonality renormalizes the tunneling matrix elements and spectral weights of Green functions. (C) 1999 Elsevier Science B.V. All rights reserved.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Petrakovskii G. A., Sablina K. A.
Заглавие : Resonant microwave conductivity response to ac current in La0.7Pb0.3MnO3 crystals
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 12. - P2008-2013. - ISSN 1063-7834, DOI 10.1134/1.1131144
Примечания : Cited References: 10
Предметные рубрики:
Аннотация: An experimental study of the effect of low-frequency transport current on the microwave conductivity of single-crystal La0.7Pb0.3MnO3 is reported. In the absence of an external magnetic field, the microwave conductivity response to a current follows a relaxation behavior. In a nonzero external magnetic field, the response spectrum exhibits a peak of resonant amplitude enhancement. The resonant response has a nonlinear nature. The temperature and field dependences of the main parameters of the microwave response correlate directly with the behavior of the magnetoresistance. The results obtained are analyzed within the oscillator approximation. Electronic phase separation is proposed as a possible mechanism for the current action. (C) 1999 American Institute of Physics. [S1063-7834(99)01612-3].
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Petrakovskii G. A., Sablina K. A., Koval' S. V.
Заглавие : Influence of the transport current on the magnetoelectric properties of La0.7Pb0.3MnO3 single crystals with giant magnetoresistance in the microwave region
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 11. - P1842-1849. - ISSN 1063-7834, DOI 10.1134/1.1131111
Примечания : Cited References: 11
Предметные рубрики:
Аннотация: The results of experiment on the influence of a direct current and a low-frequency alternating current, as well as a magnetic field, on the microwave-range conductivity sigma(MW) of Ln(0.7)Pb(0.3)MnO(3) single crystals with giant magnetoresistance are presented. The greatest sensitivity of the samples toward the effects of a current is observed in the temperature range corresponding to the dc magnetoresistance maximum. The response signal of a sample in the microwave range to the effects of an alternating current of a low frequency f(0) has a nonlinear character. As f(0) is varied in a magnetic field, the amplitude of the response signal varies with the appearance of resonance peaks. The results obtained are interpreted within an approach based on the coexistence of two phases having different conductivities in the doped manganite crystals. This two-phase interpretation is supported by data from magnetic-resonance investigations, which demonstrate the existence of two magnetic phases over a broad temperature range in Ln(0.7)Pb(0.3)MnO(3) single crystals. (C) 1999 American Institute of Physics. [S1063-7834(99)02111-5].
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrov M. I., Balaev D. A., Gokhfeld D. M., Ospishchev S. V., Shaikhutdinov K. A., Aleksandrov K. S.
Заглавие : Applicability of the theory based on Andreev reflection to the description of experimental current-voltage characteristics of polycrystalline HTSC plus normal metal composites
Место публикации : Physica C. - 1999. - Vol. 314, Is. 1-2. - P.51-54. - ISSN 0921-4534, DOI 10.1016/S0921-4534(99)00151-3
Примечания : Cited References: 19
Предметные рубрики: WEAK LINKS
JUNCTIONS
FILMS
Ключевые слова (''Своб.индексиров.''): ybacuo + bapbo3 composites--network of weak s-n-s links--current-voltage characteristic
Аннотация: Measurements of current-voltage characteristics (CVC) of Y3/4Lu1/4Ba2,Cu3O7 + BaPbO3 and Y3/4Lu1/4Ba2Cu3O7 +BaPb0.9Sn0.1O3 composites modelling network of superconducting-normal metal-superconducting (S-N-S) junctions in effectively 'clean' and 'dirty' limits, respectively, have been performed. Essential difference of CVCs for these composites is observed in spite of the identical preparation technique and experimental conditions. It is shown that the theory for S-N-S junctions [R. Kummel, U. Gunsenheimer, R. Nicolsky, Phys. Rev. B, 42 (1990) 3932] well describes the experimental CVCs of the composites in both cases. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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