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  • Positron annihilation  (1)
  • phonon–plasmon scenarios  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Low-Energy Electronic Collective Modes and Superconductivity in Layered Systems (2000)
    Springer
    Journal of superconductivity 13 (2000), S. 907-909 
    Details
    ISSN: 1572-9605
    Keywords: Coulomb interaction ; low-energy electronic collective modes ; phonon–plasmon scenarios
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The Coulomb interaction induces low-energy electronic collective modes (LEECM) in layered conductors. We study how the superconducting critical temperature T c is affected by such collective modes within the strong-coupling theory of superconductivity. Whereas we account for both the electron–phonon and the screened Coulomb interactions, the main focus is set on the latter. The dielectric function is displayed and screening within RPA is discussed. We then show that LEECM affect the superconducting state constructively in layered structures. Their effect can be interpreted as a negative μ* in the Eliashberg theory. We examine in what respect the collective-mode scenario differs in layered conductors as compared to three-dimensional (3D) isotropic metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026478605060
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Positron-annihilation lifetime in the high-T c Oxides (1990)
    Springer
    Journal of superconductivity 3 (1990), S. 227-231 
    Details
    ISSN: 1572-9605
    Keywords: Positron annihilation ; theory ; high-temperature superconductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The superconducting transition affects the positron-annihilation lifetime in the high-Tc oxides. This effect is due to the unusual properties of the oxides in the normal state and, in particular, to the small Fermi energy. The value of the shift also depends on the interlayer distance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624513
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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