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  • 1
    Electronic Resource
    Electronic Resource
    Unusual Photon Energy Dependence of the Cooper Pair Breaking Rate in YBa2Cu3O7−δ Epitaxial Thin Films (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 675-680 
    Details
    ISSN: 1572-9605
    Keywords: YBCO ; Cooper pair ; thin films ; ultrafast phenomena
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The transient photoimpedance response of epitaxial YBa2Cu3O7−δ thin films has been studied using 100 fs Ti:Sapphire laser pulse excitation. Both temperature and photon energy dependence of the fast optical response signal (whose temperature dependence can be explained by a kinetic inductance model involving Cooper pair breaking) were studied. The pair breaking rate is strongly photon energy-dependent, with a resonance around 1.5 eV with a width of only 100 meV, which is very surprising given the strong electron correlation in this metallic system and may be explained in terms of the stripe phase model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007708304186
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Solution Bounds for the Discrete Riccati Equation and Its Applications (1998)
    Springer
    Journal of optimization theory and applications 99 (1998), S. 443-463 
    Details
    ISSN: 1573-2878
    Keywords: Discrete Riccati equation ; robust stabilization ; time-delay systems ; robust stabilizability criterion ; state feedback control laws
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, we address the estimation problem for the solution of the discrete algebraic matrix Riccati equation. Both upper and lower bounds are measured. Compared to the majority of the approaches proposed in the literature, the present results are sharper. We also apply the results obtained to solve the robust stabilization problem of discrete time-delay systems. A robust stabilizability criterion and the corresponding state feedback control law are proposed. Furthermore, the tolerable bound of the delay term is also estimated. Finally, numerical examples are given to demonstrate the applications of the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021730512293
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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