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VOLUME 58 (1993) | ISSUE 6 | PAGE 412
Magnetic field enhancement of the c-axis resistivity peak near Tc in layered superconductors
The contributions to the c-axis conductivity from fluctuations of the normal quasiparticle density of states are opposite in sign to the Aslamazov-Larkin and Maki-Thompson contributions, which lead to a peak in the overall c-axis resistivity pc(T) above Tc. In a magnetic field H|| c, this peak increases in magnitude and is shifted to lower Thy an amount proportional to H1 for weak fields and to Η for strong fields. Our results are discussed in regard to recent experiments with YBa2Cu307_fi and Bi2Sr2CaCu208+5.