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  • 1975-1979  (4)
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Material
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  • 1
    Electronic Resource
    Electronic Resource
    Dynamical correlation functions in thex-y model (1978)
    Springer
    The European physical journal 30 (1978), S. 177-182 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For ax-y spin chain with free ends the dynamical correlation function is examined at zero temperature. The critical exponents are shown to be severely influenced by the boundaries. In addition new results pertaining to cyclic boundary conditions are derived within an appropriate limit procedure. In particular the asymptotic behavior of the selfcorrelation function agrees with the prediction of a continuum version of this model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320984
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Density of states in type-II superconductors in high magnetic fields (1975)
    Springer
    The European physical journal 21 (1975), S. 263-267 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the Gorkov theory as modified by Eilenberger we derive a consistent calculation scheme for the density of states near the upper critical field. This method applies to arbitrary impurity concentration and becomes in particular simple in the clean limit. Special attention was paid to the effect of anisotropic impurity scattering (p-waves).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313306
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Boundary effects on static spin correlation functions in the isotropicX—Y chain at zero temperature (1977)
    Springer
    The European physical journal 26 (1977), S. 351-353 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this work the static spin correlation of an isotropicX—Y-chain with free ends at zero temperature is dealt with. Following the method of Lieb, Schultz, Mattis the problem is reduced to the evaluation of a determinant of the Cauchy type. With regard to the transverse correlation function we find a change from aR −3/4 to aR −1/2 behavior if the correlated spins move away from the boundary at fixed mutual distanceR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570745
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrasonic attenuation and thermal conductivity in clean, type II superconductors (1978)
    Springer
    Journal of low temperature physics 32 (1978), S. 869-879 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Based on the reformulation of the Gor'kov equations by Eilenberger, Larkin, and Ovchinnikov, we propose a calculational method for transport coefficients in clean, type II superconductors. For the ultrasonic attenuation rate α (q∥B) and the thermal conductivity κ (▽T ⊥ B) we give analytical expressions near the upper critical field H c2 at low temperatures. Comparison with experiment leads to satisfactory agreement with the theoretical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00056664
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    Paper (German National Licenses)
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