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  • 1
    Electronic Resource
    Electronic Resource
    Strings in charge-transfer Mott insulators: Effects of lattice vibrations and the Coulomb interaction (2000)
    Springer
    JETP letters 72 (2000), S. 569-573 
    Details
    ISSN: 1090-6487
    Keywords: 71.38.+i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Applying the canonical transformation with the 1/λ perturbation expansion in the nonadiabatic and intermediate regime and the discrete generalization of Pekar’s continuous nonlinear equation in the extreme adiabatic regime, we show that there are no strings in narrow-band ionic insulators due to the Fröhlich electron-phonon interaction alone. The multipolaron system is a homogeneous state in a wide range of physically interesting parameters, no matter how strong the correlations are. At the same time, the Fröhlich interaction allows the antiferromagnetic interactions and/or short-range electron-phonon interactions to form short strings in doped antiferromagnetic insulators if the static dielectric constant is large enough.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1348483
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  • 2
    Electronic Resource
    Electronic Resource
    Current filamentation and macroturbulence in superconductors in rotating magnetic fields (1997)
    Springer
    JETP letters 65 (1997), S. 264-269 
    Details
    ISSN: 1090-6487
    Keywords: 74.60.−w ; 74.72.Yg ; 74.25.Ha ; 74.25.Fy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The onset of specific magnetic structures associated with the formation of extended current filaments is observed in YBCO single crystals in a rotating magnetic field. Like current filaments in a plasma, they are unstable and decay into current macrovortices. The appearance of filaments is explained by the formation of closed flux rings along magnetization-reversal fronts and collapse of these rings with formation of Meissner cylinders. The total current along the surface and in the vortex shell of the cylinder (the latter current dominates in high-T c superconductors) exceeds the critical current in the same volume located far from a filament.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567358
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