Evidence for pairing above Tc from the dispersion in the pseudogap phase   of cuprates
  In the underdoped high temperature superconductors, instead of a complete Fermi surface above Tc, only disconnected Fermi arcs appear, separated by regions that still exhibit an energy gap. We show that in this pseudogap phase, the energy-momentum relation of electronic excitations near E_F behaves like the dispersion of a normal metal on the Fermi arcs, but like that of a superconductor in the gapped regions. We argue that this dichotomy in the dispersion is hard to reconcile with a competing order parameter, but is consistent with pairing without condensation. 
A. Kanigel, U. Chatterjee, M. Randeria, M. R. Norman, G. Koren, K.   Kadowaki, J. C. Campuzano