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  • 1
    Electronic Resource
    Electronic Resource
    Commensurability in one-dimensional lattices at finite temperature (1979)
    Springer
    Journal of statistical physics 21 (1979), S. 497-516 
    Details
    ISSN: 1572-9613
    Keywords: Commensurability transition ; pinning of incommensurate systems ; one-dimensional charge density waves ; superionic conductors ; mercury chain compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The theory of commensurability transitions in one-dimensional atomic chains has been applied to charge density waves, mercury chain compounds, superionic conductors, etc. Previous numerical and analytical results on a model with chains of atoms with nearest neighbor interactions and periodic external potentials have dealt mainly with equilibrium and dynamical properties atT = 0 K. These studies are extended to nonzero temperatures. It is found that the reversible work per particle to slide the chain vanishes in the thermodynamic limit for any nonzero temperature. The mathematical pathologies associated with the commensurability transition atT= 0 (i.e., the “devil's stair”) are absent at finite temperature; only thermodynamic evidence of low-order Commensurability transitions remains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01011165
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Bulk Josephson energies in multi-gap models of highT c superconductors (1991)
    Springer
    Journal of superconductivity 4 (1991), S. 361-364 
    Details
    ISSN: 1572-9605
    Keywords: Josephson effect ; two gaps ; highT c superconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Multi-gap models of high temperature ceramic superconductors have been of considerable recent interest. For the case of a two-gap model (Δ1, and Δ2), there exist two separate electron pair condensate reservoirs, and a bulk Josephson free energy can be associated with electron pair transitions from one reservoir to the other. Thus, a “Josephson effect” can exist in two-gap models without the requirement of a weak link separating the two electron pair reservoirs in space. A single bulk sample Josephson electron pair free energy is here derived from the conventional BCS model of the superconducting state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618217
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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