C-axis negative magnetoresistance and upper critical field of Bi2Sr2CaCu2O8

Details C-axis negative magnetoresistance and upper critical field of Bi2Sr2CaCu2O8 C-axis negative magnetoresistance and upper critical field of Bi2Sr2CaCu2O8

2000-06-06

arxiv.org/abs/cond-mat/0006089v2

Physics

Condensed Matter

Superconductivity

4 pages (REVTeX), 4 figures, submitted to Physical Review Letters 6 April 1999, rejected in February 2000, accepted for public

Scientific paper

10.1209/epl/i2000-00357-4

The out-of-plane resistance and the resistive upper critical field of BSCCO-2212 single crystals with Tc=91-93 K have been measured in magnetic fields up to 50 T over a wide temperature range. The results are characterised by a positive linear magnetoresistance in the superconducting state and a negative linear magnetoresistance in the normal state. The zero field normal state c-axis resistance, the negative linear normal state magnetoresistance, and the divergent upper critical field Hc2(T)are explained in the framework of the bipolaron theory of superconductivity.

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