Abstract
We report on the -axis resistivity in that peaks in quasistatic magnetic fields up to 60 T. By suppressing the Josephson part of the two-channel (Cooper pair/quasiparticle) conductivity , we find that the negative slope of above the peak is due to quasiparticle tunneling conductivity across the layers below . At high fields (a) grows linearly with , and (b) tends to saturate ( ) as , consistent with the scattering at the nodes of the -wave gap. A superlinear marks the normal state above .
- Received 20 August 1999
DOI:https://doi.org/10.1103/PhysRevLett.84.1784
©2000 American Physical Society