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Experiments on potential differences in the low-temperature vortex solidphase of monocrystalline platelets of superconducting Bi(2)Sr(2)CaCu(2)O(8)(BSCCO) subjected to currents driven either through an "ab" surface or from onesuch surface to another show evidence of a resistive/nonresistive front movingprogressively out from the current contacts as the current increases. The depthof the resistive region has been measured by a novel in-depth voltage probecontact. The position of the front associated with an injection point appearsto depend only on the current magnitude and not on its withdrawal point. It isargued that enhanced nonresistive superconducting anisotropy limits currentpenetration to less than the London length and results in a flat rectangularresistive region with simultaneous "ab" and "c" current breakdown which movesprogressively out from the injection point with increasing current.Measurements in "ab" or "c" configurations are seen to give the sameinformation, involving both ab-plane and c-axis conduction properties.Comment: 9 pages, 13 figures, typo error corrected, last section was refine

physical review. b, condensed matter

Potential and current distribution in strongly anisotropic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Bi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CaCu</mml:mi></mml:mrow…

Potential and current distribution in strongly anisotropicBi2Sr2CaCu