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  • 1
    Electronic Resource
    Electronic Resource
    Cooper pair breaking and isotope effect coefficient variation in high-T c superconductors (1996)
    Springer
    Journal of superconductivity 9 (1996), S. 269-271 
    Details
    ISSN: 1572-9605
    Keywords: YBa2Cu3O7 ; pair breaking ; isotope effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The effect of pair breaking on the isotope effect coefficientα=−d lnT c/d lnM in La2−x Sr x CuO4 and Pr-, Ca-, and Zn-doped YBa2Cu3O7−x and EuBa2Cu3O7−x is studied using the generalized Abrikosov-Gorkov theory recently employed by Singh and Kishore for superconductivity. It is argued that the isotope effect coefficientα can be further enhanced, in agreement with experimental observations, by considering the dependence of the characteristic scattering timeτ s for Cooper pairs on the concentrationn of impurities (both magnetic and nonmagnetic) and the disorder ignored by them (J. Supercond. 8, 9 (1995).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00727546
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A Possible Explanation of Critical Temperature and Isotope Effect Coefficient of High T c Cuprate Superconductors (1998)
    Springer
    Journal of superconductivity 11 (1998), S. 663-665 
    Details
    ISSN: 1572-9605
    Keywords: Critical temperature ; isotope effect ; high-T c superconductors ; electron–phonon ; electron–biexciton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The expressions for superconducting transition temperature (T c) and isotope effect coefficient (α) have been derived from a generalized integral gap equation for a strongly coupled superconductor, when electrons–phonons and electrons–biexcitons are simultaneously present in high-T c cuprate superconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022616417676
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    Paper (German National Licenses)
    Fulltext
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