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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Biexciton on Cooper Pairing in High Tc Superconductors (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 441-443 
    Details
    ISSN: 1572-9605
    Keywords: Cooper pairing ; biexciton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract In this paper, we have modified the Cooper theory by considering a biexcitonic attractive interaction for high T c superconductors. We have developed an expression for (2Δ/K B T c) as a function of phonon and biexciton mediated coupling constants. For the sake of simplicity, we use a two-square-well potential model (electron–phonon and electron–biexciton). The calculated values of (2Δ/K B T c) show good agreement with experimental values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007730105674
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A possible explanation for the isotope effect in high-T c and Rb3C60 superconductors (1995)
    Springer
    Journal of superconductivity 8 (1995), S. 9-10 
    Details
    ISSN: 1572-9605
    Keywords: Isotope effect ; superconductivity ; fullerenes ; oxide superconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The role of pair breaking effects on the isotope effect coefficient is investigated using the generalized Abrikosov and Gorkov theory of superconductors. It is found that the pair breaking effects enhance the isotope effect coefficient. This provides a plausible explanation for the enhancement of the isotope effect coefficient as a function of impurity concentration in yttrium-, europium-, and lanthanum-based high-T c superconductors. It may also explain the very large value of the isotope effect coefficient in Rb3C60 superconductors provided some intrinsic disorder is assumed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00732233
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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