  We measured the electronic-structure of FeSe_xTe_1-x above and below Tc. In
the normal state we find multiple bands with remarkably small values for the
Fermi energy, E_F. Yet,below Tc we find a superconducting gap, Delta, that is
comparable in size to E_F, leading to a ratio Delta/E_F~0.5 that is much larger
than found in any previously studied superconductor. We also observe an
anomalous dispersion of the coherence peak which is very similar to the
dispersion found in cold Fermi-gas experiments and which is consistent with the
predictions of the BCS-BEC crossover theory.
