EVIDENCE FOR d-WAVE ORDER PARAMETER SYMMETRY IN Bi-2212 FROM EXPERIMENTS ON INTERLAYER TUNNELING

摘要

We consider three group experiments on interlayer tunneling on Bi-2212 mesa-type structures, fabricated by focused ion beam (FIB) technique from Bi-2212 single crystal whiskers, pointing out to the d-wave type of the order parameter (OP) in this compound. We specify the experiments on low temperature interlayer quasiparticle conductivity and magneto-conductivity on small Bi-2212 mesas and the experiments on Josephson flux-flow dissipation on long Bi-2212 mesas. All the results are shown to be consistent with a d-wave Fermi-liquid model with a significant contribution of coherent interlayer tunneling.