Journal article

Defect-induced changes in the spectral properties of high-Tc cuprates

Superconductivity in high-Tc cuprates is particularly sensitive to disorder due to the unconventional d-wave pairing symmetry. We investigated effects of disorder on the spectral properties of Bi2Sr2CaCu2O8+x high-Tc superconductor. We found that already small defect densities suppress the characteristic spectral signature of the superconducting state. The spectral line shape clearly reflects new excitations within the gap, as expected for defect-induced pair breaking. At the lowest defect concentrations the normal state remains unaffected, while increased disorder leads to suppression of the normal quasiparticle peaks

    Keywords: bismuth compounds ; calcium compounds ; crystal defects ; high-temperature superconductors ; quasiparticles ; spectral line breadth ; strontium compounds


    Inst. de Phys. Appliquee, Ecole Polytech. Federale de Lausanne, Switzerland

    Copyright 2000, IEE



    defect-induced changes

    spectral properties

    high-Tc cuprates

    d-wave pairing symmetry



    high-Tc superconductor

    defect densities

    characteristic spectral signature

    superconducting state

    spectral line shape

    defect-induced pair breaking

    defect concentrations

    normal state

    normal quasiparticle peak suppression



    • LSE-ARTICLE-1999-025

    Record created on 2006-10-03, modified on 2016-08-08


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