THEORETICAL EXPLANATION OF BROAD RESISTIVE TRANSITION IN HIGH-TEMPERATURE SUPERCONDUCTORS IN MAGNETIC-FIELD

Experimental data on the broad resistive transitions in high temperature superconductors (HTSC) in strong magnetic fields, obtained with high quality samples, are compared with results of the renormalized fluctuation theory. The theory is extended to lower temperature by a partial summation method called SPH. The layer structure is kept throughout the calculation. The quantitative agreement is obtained over a wide range of temperature in both geometries I//H and I⊥H. It is remarkable that the theory can explain the observed low temperature behavior of ρ⊥ suggestive of the flux flow mechanism and its absence in ρ//. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.