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  • 1
    Electronic Resource
    Electronic Resource
    Fermi system with planes and charge reservoir: Anisotropic in-plane resistivity (1992)
    Springer
    Journal of low temperature physics 89 (1992), S. 551-555 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We explore the normal state in-plane resistivity of a model Fermi system with two planes and a charge reservoir. When the Fermi energy lies near the top of one of the resulting sub-bands, the system can be described by two types of quasiparticle excitations with different energy spectra and relaxation times. We show that for certain stoichiometry, ρab is linear in temperature with positive or negative intercepts. A relation between the slopes and intercepts of resistivities in the a and b directions in untwinned crystals is derived. The results are in good agreement with experimental data on YBCO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694085
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A model for paramagnetic Fermi systems (1983)
    Springer
    Journal of low temperature physics 50 (1983), S. 319-336 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We develop a model for paramagnetic Fermi liquids. This model has both direct and induced interactions, the latter including both density-density and current-current response. The direct interactions are chosen to reproduce the Fermi liquid parametersF 0 s ,F 0 a ,F 1 s and to satisfy the forward scattering sum rule. TheF 1 a andF 1 s,a for1〉1 are determined self-consistently by the induced interactions; they are checked against experimental determinations. The model is applied in detail to liquid3He, using data from spin-echo experiments, sound attenuation, and the velocities of first and zero sound. Consistency with experiments gives definite preferences for values ofm*. The model is also applied to paramagnetic metals. Arguments are given that this model should provide a basis for calculating effects of magnetic fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00681609
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An induced interaction model for arbitrarily polarized Fermi systems (1985)
    Springer
    Journal of low temperature physics 58 (1985), S. 89-125 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A model for calculating the interactions in arbitrarily spin-polarized Fermi systems is presented. Starting from the four-point vertex functions, the “induced” part of the interactions is deduced by explicitly treating the one-particle, one-hole irreducible diagrams and using some general crossing symmetry relations. Extrapolation away from the Fermi surface is carried out by replacing the particle-hole phase space by Lindhard functions in the “crossed” channel; consequently, calculation of the necessary ↑-↓ phase space function is presented. The longitudinal spin-density and density responses for polarized systems are obtained by diagrammatic means. A possible way of treating the “direct” part of the interactions using Born approximation is also discussed. Finally, the limits of the model for zero and full polarization are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682568
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    Paper (German National Licenses)
    Fulltext
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