Vortex-pair excitation near the superconducting transition of Bi2Sr2CaCu2O8 crystals

The dissipation observed at the superconducting transition of the high-Tc superconductor Bi2Sr2CaCu2O8 is explained quantitatively by the Kosterlitz- Thouless (1973) theory of vortex-antivortex pair excitations within the CuO2 planes. This conclusion is drawn from the observation of an exponential s...

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Bibliographic Details
Published in:Physical review letters 1989-02, Vol.62 (6), p.677-680
Main Authors: MARTIN, S, FIORY, A. T, FLEMING, R. M, ESPINOSA, G. P, COOPER, A. S
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:The dissipation observed at the superconducting transition of the high-Tc superconductor Bi2Sr2CaCu2O8 is explained quantitatively by the Kosterlitz- Thouless (1973) theory of vortex-antivortex pair excitations within the CuO2 planes. This conclusion is drawn from the observation of an exponential square-root singularity in the resistivity and a power-law dependence of the resistivity on magnetic field. The Kosterlitz-Thouless phase transition (Tc = 84.7 K) is at the rho = 0 point, and the mean-field Ginzburg-Landau transition (Tc0 = 86.8 K) at about 25 percent of the normal- state resistivity. (Author)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.62.677