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  • Articles  (14)
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  • 73.20.Dx  (14)
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  • Physics  (14)
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  • Electrical Engineering, Measurement and Control Technology
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  • Articles  (14)
  • Other Sources
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  • Springer  (14)
  • American Geophysical Union
  • American Institute of Physics (AIP)
  • American Physical Society
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  • 2000-2004
  • 1995-1999  (14)
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  • Physics  (14)
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  • 1
    Electronic Resource
    Electronic Resource
    Competition between single-and multiparticle resonances in tunneling (1997)
    Springer
    JETP letters 65 (1997), S. 484-490 
    Details
    ISSN: 1090-6487
    Keywords: 73.40.Gk ; 73.20.Dx ; 72.15.Eb ; 71.20.Be
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new mechanism is proposed for the anomalous tunneling transmittance of a double-barrier quantum-well structure doped with a transition-metal impurity and possessing an intrinsic two-dimensional continuum. The new tunneling channels are due to exponentially-narrow single-particle resonances arising near the edge of a 2D band during tunneling. They are temperature-independent and their contribution to the transmittance can exceed the contribution of the Kondo resonance even at temperatures T〈T K .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567383
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  • 2
    Electronic Resource
    Electronic Resource
    Capacitance spectroscopy investigation of the spin polarization of two-dimensional electronic systems (1997)
    Springer
    JETP letters 65 (1997), S. 108-113 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx ; 73.40.Hm ; 84.37.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that capacitance spectroscopy can be used to investigate the spin polarization of two-dimensional electronic systems (2DESs). We employed this method to investigate the spin polarization of 2DESs in a GaAs/AlGaAs heterojunction for filling factors of the magneticquantization levels 0.28〈ν〈0.9. It is proved that in the presence of states of the fractional quantum Hall effect with ν f =1/3 and 2/3 the ground state of a 2DES with ν〉2/3 is incompletely spin-polarized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567334
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  • 3
    Electronic Resource
    Electronic Resource
    Fine structure of excitonic levels in quantum dots (1997)
    Springer
    JETP letters 65 (1997), S. 804-809 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx ; 71.35.−y ; 33.15.Pw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experimental results of a study of the fine structure of the levels of excitons localized in InAlAs quantum dots in an AlGaAs matrix are reported. Transformations from optical orientation to alignment and from alignment to orientation, which occur due to the exchange splitting of a dipole-active excitonic doublet and are allowed by the low symmetry of a quantum dot, are observed in a longitudinal magnetic field (Faraday geometry). A comparison of theory with experiment for a self-organized ensemble of quantum dots enables a determination of the character of the distribution over the dipole orientations for resonance optical transitions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567429
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  • 4
    Electronic Resource
    Electronic Resource
    Interplay between fermion condensation and density-wave instability (1997)
    Springer
    JETP letters 65 (1997), S. 253-258 
    Details
    ISSN: 1090-6487
    Keywords: 71.45.Gm ; 73.20.Dx ; 73.40.Lq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that the phase transition of density-wave origin in homogeneous liquids is preceded by fermion condensation. Thus fermion condensation may be observed in low-density electron liquids, neutron stars, and liquid He3. Three-dimensional (3D) and two-dimensional (2D) liquids are considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567356
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  • 5
    Electronic Resource
    Electronic Resource
    Hall resistance anomalies induced by a radiation field (1997)
    Springer
    JETP letters 66 (1997), S. 431-436 
    Details
    ISSN: 1090-6487
    Keywords: 72.20.My ; 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study is made of the four-terminal Hall junction under the influence of a radiation field. The frequency of the radiation field is tuned to a transition between the energy of a bound state below a conduction subband and the Fermi energy of the incident electrons. Radiation-field-induced resonant dips of the Hall resistance are exhibited at low magnetic fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567533
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  • 6
    Electronic Resource
    Electronic Resource
    Two-dimensional electron gas in double quantum wells with tilted bands (1997)
    Springer
    JETP letters 65 (1997), S. 877-882 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract When a voltage is applied to double quantum wells based on AlGaAs/GaAs heterostructures with contact regions (n-i-n structures), a two-dimensional (2D) electron gas appears in one of the quantum wells. Under illumination which generates electron-hole pairs, the photoexcited holes become localized in a neighboring quantum well and recombine radiatively with the 2D electrons (tunneling recombination through the barrier). The appearance, ground-state energy, and density of the degenerate 2D electron gas are determined from the structure of the Landau levels in the luminescence and luminescence excitation spectra as well as from the oscillations of the radiative recombination intensity in a magnetic field with detection directly at the Fermi level. The electron density is regulated by the voltage between the contact regions and increases with the slope of the bands. For a fixed slope of the bands the 2D-electron density has an upper limit determined by the resonance tunneling of electrons into a neighboring quantum well and subsequent direct recombination with photoexcited holes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567440
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  • 7
    Electronic Resource
    Electronic Resource
    Optical orientation in p-doped semiconductor structures with a split valence band (1997)
    Springer
    JETP letters 65 (1997), S. 909-914 
    Details
    ISSN: 1090-6487
    Keywords: 78.20.Bh ; 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The optical orientation of electron spins in heavily doped semiconductor structures with a valence band that is split as a result of size quantization or uniaxial deformation is investigated theoretically. It is shown that lowering the Fermi level by doping and by lowering the temperature should lead to sharp changes in the photon-energy-dependence of the average spin of the excited electrons in structures excited by circularly polarized light. This effect is due to an interchange of the dominant contribution of transitions from a light-hole subband and transitions from the heavy-hole subband in absorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567448
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  • 8
    Electronic Resource
    Electronic Resource
    Squeezed states of long-lived terahertz vibrations in quantum dots (1997)
    Springer
    JETP letters 65 (1997), S. 215-216 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quantum dots based on materials with long-lived terahertz vibrations are studied. It is shown that squeezed states of such vibrations can result in microwave-frequency modulation of the optical radiation absorbed at electronic transitions in quantum dots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567312
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  • 9
    Electronic Resource
    Electronic Resource
    Near field scanning optical spectroscopy of InP single quantum dots (1997)
    Springer
    JETP letters 66 (1997), S. 528-533 
    Details
    ISSN: 1090-6487
    Keywords: 73.61.Ey ; 73.20.Dx ; 07.79.Fc ; 61.16.Ch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study InP quantum dots which are prepared by strain induced self-assembly on GaAs substrates with a GaInP buffer layer using a near field scanning optical microscope operating at near liquid He bath temperatures in the collection mode. Single quantum dots are identified spatially and spectrally due to their photoluminescence spectrum. Series of luminescence lines due to single dots of different sizes are discussed in terms of dot height and width fluctuations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567559
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  • 10
    Electronic Resource
    Electronic Resource
    Single-electron computing without dissipation (1997)
    Springer
    JETP letters 66 (1997), S. 298-303 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibility of performing single-electron computing without dissipation in an array of tunnel-coupled quantum dots is studied theoretically, taking the spin gate NOT (inverter) as an example. It is shown that the logical operation can be implemented at the stage of unitary evolution of the electron subsystem, although complete switching of the inverter cannot be achieved in a reasonable time at realistic values of model parameters. The optimal input magnetic field is found as a function of the interdot tunneling energy and intradot Coulomb repulsion energy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567471
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  • 11
    Electronic Resource
    Electronic Resource
    Magnetoplasmon replica in the recombination radiation spectra of a quasi-two-dimensional electron gas in GaAs/AlGaAs quantum wells (1997)
    Springer
    JETP letters 66 (1997), S. 575-580 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx ; 73.20.Mf ; 78.60.−b ; 78.55.Cr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The radiative recombination spectra of two-dimensional electrons with free photoexcited holes are investigated for a wide variety of GaAs/ AlGaAs quantum wells, with different thicknesses and electron densities. It is found that for certain, close to integral, filling factors an intense line corresponding to an Auger process — radiative recombination with the emission of an additional magnetoplasmon — appears in the luminescence spectrum. The new line is shifted to lower energies with respect to the zero Landau level, and the magnetic field dependence of the energy splitting between these lines agrees with the theoretical concepts of the dispersion of magnetoplasmon excitations. This makes it possible to estimate the magnetoplasmon energy at the roton minimum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567548
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  • 12
    Electronic Resource
    Electronic Resource
    Anisotropic momentum transfer in low-dimensional electron systems in a magnetic field (1997)
    Springer
    JETP letters 66 (1997), S. 588-593 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In low-dimensional systems with an asymmetric quantizing potential, an asymmetric electron energy spectrum ε(p)≠ε(−p), where p is the electron momentum, arises in the presence of a magnetic field. A consequence of such an energy spectrum is that momentum transfer to the electron system in mutually opposite directions in the presence of an external perturbation is different. Therefore, in the presence of a standing electromagnetic wave momentum is transferred from the wave to the electrons, which gives rise to a new type of electromotive force.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567550
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  • 13
    Electronic Resource
    Electronic Resource
    Splitting of transverse optical phonon modes localized in GaAs quantum wires on a faceted (311)A surface (1997)
    Springer
    JETP letters 66 (1997), S. 47-51 
    Details
    ISSN: 1090-6487
    Keywords: 73.61.Ey ; 73.20.Dx ; 63.22.+m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The energy splitting of fundamental localized transverse optical (TO1) phonon modes in GaAs/AlAs superlattices and quantum wires grown by molecular-beam epitaxy on a faceted (311)A GaAs surface is observed by Raman spectroscopy. The form of the Raman scattering tensor makes it possible to observe the TOx and TOy modes separately, using different scattering geometries the y and x axes are the directions of displacement of the atoms and are directed parallel and transverse to the facets on the (311)A surface). Enhancement of the splitting of the TO1x and TO1y modes is observed as the average thickness of the GaAs layers is decreased from 21 to 8.5 Å. The splitting is probably due to the effect of the corrugation of the GaAs/AlAs (311)A hetero-interface on the properties of localized phonon modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567481
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  • 14
    Electronic Resource
    Electronic Resource
    On the electrostatic potential distribution in a screened Corbino disk carrying a transport current under conditions of the quantum Hall effect (1997)
    Springer
    JETP letters 66 (1997), S. 581-587 
    Details
    ISSN: 1090-6487
    Keywords: 73.20.Dx ; 73.40.Hm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that the characteristic features of the chemical potential for 2D electrons in a magnetic field, which lead to sharp dips in the magnetic field dependence of the capacitance of a 2D system, also affect the electrostatic potential distribution in the direction of the transport current flowing through a 2D Corbino disk under conditions of integral magnetic filling factor. The associated details of the temperature dependence of the electrostatic potential distribution, the distances to the screening electron, and the transport potential difference at the Corbino edges are investigated. The possibilities of experimentally observing these features of the electrostatic potential distribution along a Corbino disk with a transport current under conditions of the quantum Hall effect are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567549
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