Hwu, Y.Lozzi, L.Marsi, M.Larosa, S.Winokur, M.Davis, P.Onellion, M.Berger, H.Gozzo, F.Levy, F.Margaritondo, G.2006-10-032006-10-032006-10-03199110.1103/PhysRevLett.67.2573https://infoscience.epfl.ch/handle/20.500.14299/234537WOS:A1991GL80100043Improved experimental conditions enabled us to increase the signal-to-noise ratio of the photoemission spectra for the superconducting state of Bi2Ca2SrCu2O8, taken with high angular and energy resolution. This also enabled us to reveal a pronounced minimum that separates the two basic features of the spectrum, the narrow quasiparticle excitation peak and the still controversial broad band at lower kinetic energies. The minimum is approximately 3-DELTA below the Fermi level.ANGLE-RESOLVED PHOTOEMISSIONCA-CU-OBI2SR2CACU2O8GAPSPECTROSCOPYtext::journal::journal article::research article