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  • 1
    Electronic Resource
    Electronic Resource
    Ohmic and radiation losses in superconducting films (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 892-894 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The losses associated with leakage through thin-film superconductors with film thickness comparable to the skin depth in the normal state, and to the penetration depth in the superconducting state, are described. The method is used to describe the surface resistance of YBa2Cu3O7 films deposited on various substrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346753
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  • 2
    Electronic Resource
    Electronic Resource
    Theory of intermodulation in a superconducting microstrip resonator (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 2002-2009 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The penetration depth and surface resistance of a superconductor depend upon the superfluid current density. This dependence gives rise to nonlinear mixing in a superconducting microstrip resonator. Here we discuss the problem of intermodulation in which two signals at ω1 and ω2, laying within the pass band of a microstrip cavity resonance, mix and generate a signal at 2ω1−ω2. An expression relating the power generated at 2ω1−ω2 to the power transmitted at ω1 and ω2 is given. We focus on the high-Tc superconductors where it is believed that the order parameter has dx2−y2 symmetry. We find for a resonator with a large unloaded Q that intermodulation arises dominantly from the reactive nonlinear inductance of the superconducting film. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364056
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  • 3
    Electronic Resource
    Electronic Resource
    Theoretical studies of high Tc superconductors (invited) (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4019-4019 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The current theoretical ideas concerning the mechanism responsible for the high transition temperature of the superconducting oxides will be reviewed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340535
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  • 4
    Electronic Resource
    Electronic Resource
    Theory of microwave intermodulation in a high-Tc superconducting microstrip resonator (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 4248-4250 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We calculate the intermodulation power for a superconducting microstrip resonator arising from the intrinsic microscopic nonlinearities. We focus on high-Tc superconductors where it is believed that the order parameter has dx2−y2 symmetry. A characteristic upturn of the intermodulation power is found at low temperatures. We discuss different ways to reduce intermodulations by changing the geometry of the microstrip. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116960
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  • 5
    Electronic Resource
    Electronic Resource
    Intermodulation and quality factor of high-Tc superconducting microstrip structures (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 464-468 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The intermodulation power and quality factor Q of high-Tc superconducting microstrip resonators with different shapes is calculated. Acute corners increase the losses and the intermodulation power. The influence of normal conducting regions is investigated. The case of two microstrips carrying in phase or out of phase currents is also studied. The losses and the intermodulation power are significantly reduced if the currents are in phase in the two microstrips compared to the mode with out of phase currents. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365839
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  • 6
    Electronic Resource
    Electronic Resource
    A random phase approximation theory of nuclear relaxation in CuO2 planes (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5079-5081 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nuclear magnetic resonance experiments on the planar CuO2 materials related to high-Tc superconductors suggest that the doped holes are formed from the strongly hybridized Cu(3d)-O(2pσ) orbitals. Within this picture the doped metallic state can be viewed as a strongly interacting quantum liquid, with a dynamic spin susceptibility that reflects the local correlations produced by the Coulomb interactions. It is demonstrated that much of the essential observed behavior is predicted by a simple 2D Hubbard model within the RPA, with a suitable choice of parameters, and the physical implications of these parameters are discussed. The nuclear relaxation rates T−11 at various nuclear sites are calculated. The form factors of the hyperfine interaction act to spatially filter the spin susceptibility. In particular, the O form factor suppresses the antiferromagnetic fluctuations which dominate the relaxation of Cu nuclei, thereby reducing T−11 at O relative to that of Cu, as observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344676
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  • 7
    Electronic Resource
    Electronic Resource
    Maximal coverage in random sequential absorption (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 2380-2382 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Random sequential absorption (RSA) represents an important kinetic limit for structural formation which leads to significantly different properties from that obtained under thermal equilibrium adsorption. Here we present results for the maximal coverage θJ obtained from numerical simulation of RSA on various lattices and discuss their relationship in terms of a soluble 1D model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452085
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  • 8
    Electronic Resource
    Electronic Resource
    Absence of strong coupling in YBa 2 Cu 3 0 7 inferred from infrared conductivity (1990)
    [s.l.] : Nature Publishing Group
    Nature 343 (1990), S. 242-243 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the theory of Bardeen, Cooper and Schrieffer (BCS) an effective attractive interaction, mediated by the exchange of excitations obeying Bose statistics, leads to electron pairing and superconductivity. The spectrum of these pair-mediating excitations, "2F(o〉) (where F(w) is the density of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/343242a0
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  • 9
    Electronic Resource
    Electronic Resource
    Some results from quantum monte carlo studies of the 2D Hubbard model (1994)
    Springer
    Journal of low temperature physics 95 (1994), S. 169-176 
    Details
    ISSN: 1573-7357
    Keywords: 71.10.+75.10. and 71.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quantum Monte Carlo calculations have provided insights into the magnetic, single-particle, and effective particle-particle interaction in the two-dimensional Hubbard model. Here we review some of these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00754933
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  • 10
    Electronic Resource
    Electronic Resource
    Superconducting Tc enhancement due to local phonon impurities (1987)
    Springer
    Journal of low temperature physics 69 (1987), S. 159-165 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have studied the enhancement of superconductivity due to a small concentration of local phonon impurities using a new method. The method combines diagrammatic perturbation theory and Monte Carlo simulation. This method allows us fully to take into account the retarded nature of the interactions and hence study in detail the interplay between the electron-phonon systems of the host and the impurities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682654
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