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In‐Plane Paraconductivity of Bi 2 Sr 2 CaCu 2 O 8 Single Crystals with Different Resistivity Anisotropies
Author(s) -
Han S. H.,
Zhao Y.,
Gu G. D.,
Russell G. J.,
Koshizuka N.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199709)203:1<189::aid-pssb189>3.0.co;2-3
Subject(s) - anisotropy , electrical resistivity and conductivity , condensed matter physics , superconductivity , plane (geometry) , materials science , physics , geometry , optics , mathematics , quantum mechanics
Superconducting fluctuations have been studied by systematic measurements of the in‐plane paraconductivity in Bi 2 Sr 2 CaCu 2 O 8 single crystals with different resistivity anisotropies. It has been observed that the interlayer coupling strength decreases dramatically with the anisotropy of the sample, which significantly influences the dimensional behaviour of the in‐plane paraconductivity. For all the samples studied, the in‐plane paraconductivity is in good agreement with the Lawrence and Doniach model. For the sample of highest resistivity anisotropy, the behaviour of the in‐plane paraconductivity is basically two‐dimensional, but deviates significantly from two‐dimensional behaviour as the resistivity anisotropy decreases.