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    Density of states and order parameter in dirty anisotropic superconductors

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    PhysRevB.54.13275.pdf (266.9Kb)
    Date
    1996
    Author
    Pokrovsky, SV
    Pokrovsky, Valery L.
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    Abstract
    We analyze in detail how the scattering by nonmagnetic impurities affects the shape and amplitude of the order parameter (OF) and the density of states in anisotropic superconductors in the framework of BCS theory. Special attention is paid to the case when the OP is a mixture of d and s waves changing its sign on the Fermi surface. The critical temperature is shown to decay with the increase of the residual resistance according to the power law. At zero temperature impurity scattering gives rise to a peculiar phase transition from a gapless regime to a state with a finite gap in the quasiparticle spectrum.
    URI
    http://dx.doi.org/10.1103/PhysRevB.54.13275
    http://hdl.handle.net/1969.1/127299
    Description
    Journals published by the American Physical Society can be found at http://journals.aps.org/
    Subject
    HIGH-TEMPERATURE SUPERCONDUCTORS
    D-WAVE SUPERCONDUCTORS
    ANGLE-RESOLVED
    PHOTOEMISSION
    PLANE ANISOTROPY
    BI2SR2CACU2O8+DELTA
    YBA2CU3O7-DELTA
    PHASE
    Y1-XPRXBA2CU3O7-DELTA
    TRANSITION
    SYMMETRY
    Physics
    Department
    Physics and Astronomy
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    Citation
    SV Pokrovsky and Valery L. Pokrovsky. Phys.Rev.B 54 13275-13287 1996."Copyright (1996) by the American Physical Society."

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