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  • 1
    Electronic Resource
    Electronic Resource
    The effect of thermodynamic fluctuations on the formation of superstructures in random heteropolymers (1996)
    Springer
    JETP letters 64 (1996), S. 197-201 
    Details
    ISSN: 1090-6487
    Keywords: 61.41.+e ; 68.65.eg ; 05.40.eg ; 05.70.Jk ; 05.70.Fh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The behavior of a random AB block copolymer with the same fraction of monomers of each type near the critical point has been studied. In the Brazovskii approximation it is shown that thermodynamic fluctuations give rise to a lamellar structure whose period is greater than the size of a block. The structure appears as a result of a first-order phase transition. The parameters of this transition are calculated and the region of coexistence of the disordered and lamellar phases is found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567174
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  • 2
    Electronic Resource
    Electronic Resource
    Microphase separation in multiblock copolymers (1997)
    Springer
    Journal of experimental and theoretical physics 85 (1997), S. 183-188 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The phase diagram of a multiblock copolymer containing domains of coexistence of phases having different superlattice symmetries with a density of monomers of a given type that varies periodically in space. The parameters of such superlattices are calculated in the mean-field approximation, and it is shown that their wave vector varies continuously with the temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558304
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  • 3
    Electronic Resource
    Electronic Resource
    Feasibility of studying the uniformity of a sample from phase transition parameters using voltage measurements transverse to the current (1987)
    Springer
    Radiophysics and quantum electronics 30 (1987), S. 236-240 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034495
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  • 4
    Electronic Resource
    Electronic Resource
    Quantum fluctuations and quantum dynamics of small Josephson junctions (1988)
    Springer
    Journal of low temperature physics 73 (1988), S. 1-32 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The quantum properties of small Josephson junctions with both linear Ohmic and quasiparticle (“cosine”) dissipation are investigated by means of a real-time path-integral technique. Quantum diffusion of the quasicharge and quantum corrections to the classical conductivity are analyzed. The current-voltage characteristics and the effect of voltage steps are studied. It is shown that coherent voltage oscillations may exist not only for small, but also for large values of the junction tunneling conductivity. For not very small values of the quasiparticle conductivity of the junction the frequency of these oscillations is twice the Bloch oscillation frequency. The quantum dynamics of the phase difference across the junction is studied for a wide region of parameters. It is shown that linear and “cosine” dissipation mechanisms cause the presence of two dissipative phase transitions, which are qualitatively different from each other in many aspects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00681741
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  • 5
    Electronic Resource
    Electronic Resource
    Quantum coherence and phase transitions in granular superconductors with dissipation. I. Ordered arrays (1989)
    Springer
    Journal of low temperature physics 75 (1989), S. 361-388 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate the effect of dissipative currents on a superconducting phase transition in two- and three-dimensional granular arrays. We find the corresponding phase diagrams and show that, depending on dissipation, both long-range and local quantum fluctuations may be effective in destroying the global phase coherence. For large values of charging-to-Josephson coupling energy ratio and atT=0, we find the universal critical resistanceR c only for three dimensional arrays while for two dimensional onesR c −1 diverges logarithmically with increasing of the grain charging energy. For large values of a Josephson coupling energy, quantum phase slip effects play the main role and lead to the universal critical resistance in both cases. We also investigate the effect of dissipation on the critical temperature of theXY model phase transition and show that strong dissipation is extremely effective in suppressing quantum effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00683713
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  • 6
    Electronic Resource
    Electronic Resource
    Quantum coherence and phase transitions in granular superconductors with dissipation. II. Effect of disorder (1989)
    Springer
    Journal of low temperature physics 75 (1989), S. 389-398 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study the effect of disorder on a superconducting phase transition in granular arrays with dissipation. It is shown that, for a quite weak Gaussian disorder, this effect does not lead to a qualitative change of the phase diagram. Local quantum fluctuations suppress Cooper pair tunneling for a part of Josephson junctions and thus effectively increase disorder. For strongly disordered systems, the critical resistance which corresponds to a dissipative phase transition is found to be universal for a wide range of parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00683714
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular theory of solutions and blends of heteropolymers. I. Thermodynamics of amorphous multicomponent polymer systems (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 36 (1998), S. 937-958 
    Details
    ISSN: 0887-6266
    Keywords: thermodynamics ; heteropolymers ; phase diagram ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: On the basis of a variational principle a quantitative theory is developed enabling a thermodynamic description in terms of mean field approximation of heteropolymer mixtures of macromolecules with an arbitrary distribution for both degree of polymerization and composition. Rather simple general equations are derived to calculate compositions and volume fractions of spatially homogeneous macroscopic phases as well as to find the cloud-point curve, spinodal, and critical points. Potentialities of general theory are illustrated for copolymers synthesized by traditional methods. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 937-958, 1998
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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