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  • 1
    Electronic Resource
    Electronic Resource
    Phonon relaxation of subgap levels in superconducting quantum point contacts (1998)
    Springer
    JETP letters 68 (1998), S. 890-894 
    Details
    ISSN: 1090-6487
    Keywords: 74.80.Fp ; 74.25.Kc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Superconducting quantum point contacts are known to possess two subgap states per propagating mode. In this note we compute the low-temperature relaxation rate of the upper subgap state into the lower one with the emission of an acoustic phonon. If the reflection at the contact is small, the relaxation time may become much longer than the characteristic lifetime of a bulk quasiparticle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567811
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  • 2
    Electronic Resource
    Electronic Resource
    Coagulation of charged particles in a dusty plasma (2000)
    Springer
    Journal of experimental and theoretical physics 90 (2000), S. 93-101 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An investigation is made of characteristic features in the behavior of small particles in a dusty plasma attributable partly to the suppression of coagulation as a result of monopolar charging for particle sizes smaller than the Debye shielding length and partly to the reduction in the effect of charging for larger particles. Similarity relations linking the plasma composition and particle charge with the parameters of the dust component are used to determine the range of parameters for which the linear approximation of the particle charge as a function of their sizes holds. A modified classical theory of coagulation in the diffusion approximation is used to study some anomalies in the behavior of the particle size distribution. It is established that unlike an ordinary aerosol, in a dusty plasma the dispersion of the distribution and the average particle size may decrease with time. It is shown for the first time that a long-lived “quasi-liquid” state of a dusty plasma may be established as a result of the anomalous behavior of the size distribution function of coagulating charged particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.559079
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  • 3
    Electronic Resource
    Electronic Resource
    Particle size distribution in a coagulating dusty plasma (1999)
    Springer
    Technical physics letters 25 (1999), S. 630-632 
    Details
    ISSN: 1090-6533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A modified version of the classical coagulation theory in the diffusion approximation is used to study some anomalies in the behavior of the particle size distribution function. It is established that unlike a normal aerosol, in a dusty plasma the dispersion of the distribution and the average particle size may decrease with time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1262579
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  • 4
    Electronic Resource
    Electronic Resource
    Coulomb effects in a ballistic one-channel S-S-S device (1998)
    Springer
    Journal of experimental and theoretical physics 87 (1998), S. 349-356 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We develop a theory of Coulomb oscillations in superconducting devices in the limit of small charging energy E C ≪Δ. We consider a small superconducting grain with finite capacitance connected to two superconducting leads by nearly ballistic single-channel quantum point contacts. The temperature is assumed to be very low, so there are no single-particle excitations on the grain. Then the behavior of the system can be described in terms of the quantum mechanics of the superconducting phase on the island. The Josephson energy as a function of this phase has two minima that become degenerate when the phase difference on the leads equals to π, the tunneling amplitude between them being controlled by the gate voltage on the grain. We find the Josephson current and its low-frequency fluctuations, and predict their periodic dependence with period 2e on the induced charge Q x =CV g .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558666
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  • 5
    Electronic Resource
    Electronic Resource
    The supersymmetric technique for random-matrix ensembles with zero eigenvalues (2002)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 43 (2002), S. 126-153 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The supersymmetric technique is applied to computing the average spectral density near zero energy in the large-N limit of the random-matrix ensembles with zero eigenvalues: B, DIII-odd, and the chiral ensembles (classes AIII, BDI, and CII). The supersymmetric calculations reproduce the existing results obtained by other methods. The effect of zero eigenvalues may be interpreted as reducing the symmetry of the zero-energy supersymmetric action by breaking a certain Abelian symmetry. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1423765
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  • 6
    Electronic Resource
    Electronic Resource
    Adaptation of the Rietveld method to the characterization of the lamellar microstructure of polymers. 2. Influence of a tilt of chain axes versus the normal to basal planes of crystalline lamellae (1999)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 32 (1999), S. 497-504 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: In a previous paper [Dupont, Jonas & Legras (1997). J. Appl. Cryst. 30, 921–931], a variant of the Rietveld method was applied to the characterization by X-ray scattering (powder diffractometry) of disordered and small crystals as found in semicrystalline polymers. In the present study, a new version of the model is described, which is designed to take into account the possible existence of a non-zero tilt angle (ψ) of the chain axes versus the large faces of the lamellar crystals. Fits of this model to the diffractograms of various samples of cold-crystallized PEEK [poly(ether-ether-ketone)] and of a monodisperse PEEK oligomer are presented. For the oligomer, the fits converged only towards ψ = 0°. For the polymers, two equivalent solutions were found, one with thick lamellae and ψ = 0°, another with thinner lamellae and ψ = 20°. Models with and without chain tilt give similar goodness-of-fit parameters, indicating that results coming from other techniques than X-ray diffractometry are required in order fully to characterize the dimensions and shape of crystals in isotropic polymer samples. Comparing the present values with results obtained by such other techniques suggests the existence of a tilt angle for cold-crystallized PEEK samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889899002411
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  • 7
    Electronic Resource
    Electronic Resource
    Development of the structure and crack resistance of an aluminum oxide ceramic (1986)
    Springer
    Strength of materials 18 (1986), S. 719-723 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01523947
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  • 8
    Electronic Resource
    Electronic Resource
    Cracking resistance of a laminated composite material based on ceramics (1987)
    Springer
    Mechanics of composite materials 22 (1987), S. 579-583 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The maximum values of the cracking resistance parameters, i.e., critical stress intensity factor KIc and specific effective work on fracture γF equal to 4.0 MPa·m1/2 and 250 J/m2, were obtained for alumina with the laminated structure. For the Al2O3-Cr (30% Cr) cermet with a laminated structure, the values of these parameters were equal to 6.0 MPa·m1/2 and 1000 J/m2, respectively. 2. Failure of the laminated materials is of discrete nature and is accompanied by branching of the crack at the interlayer boundaries and the boundaries of the laminated cells. 3. The kinetic special feature of failure of the laminated material made of alumina is the presence of the stages of acceleration and inhibition of crack growth as a result of the change of its orientation in relation to the direction of the effect of the maximum tensile stresses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00714804
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  • 9
    Electronic Resource
    Electronic Resource
    Initial magnetic susceptibilities of iron and nickel aerosol powders (1984)
    Springer
    Russian physics journal 27 (1984), S. 577-579 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dependence on angle is considered for the hysteresis-free initial susceptibilities χ a and χ ar together with the initial susceptibility χo for iron and nickel aerosol powders, as well as the effects on these characteristics from changes in powder packing density. Estimates are made of the negative-interaction fields, and a quantitative comparison is made between the observed χar(ψ) and theoretical values by means of the pair model. The correlation between the experimental and theoretical relationships confirms the concepts used on the predominant effects from magnetostatic interaction in the mechanism for magnetization reversal in powders of materials with low anisotropy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897450
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  • 10
    Electronic Resource
    Electronic Resource
    Landau-Zener interferometry for qubits (2003)
    Springer
    The European physical journal 36 (2003), S. 263-269 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. One may probe coherence of a qubit by periodically sweeping its control parameter. The qubit is then excited by the Landau-Zener (LZ) mechanism. The interference between multiple LZ transitions leads to an oscillatory dependence of the energy absorption rate on the sweeping amplitude and on the period. This interference pattern allows to determine the decoherence time of the qubit. We introduce a simple phenomenological model describing this “interferometer”, and find the form of the interference pattern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00343-8
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