Time dependence of current-voltage measurements of c-axis quasiparticle   conductivity in 2212-BSCCO mesa structures
  We report four-point IV measurements of the c-axis conductivity of mesa structures of 2212-BSCCO, using a system with sub-microsecond resolution along with multi-level pulses. These allow a test to be made for the presence of nonequilibrium effects. Our results suggest simple heating alone is important in measurements of this kind. 
J.C. Fenton, G. Yang and C.E. Gough