Phys. Rev. Lett. 91, 167002 (2003) [4 pages]Doping Dependence of the Mass Enhancement in (Pb,Bi)2Sr2CaCu2O8 at the Antinodal Point in the Superconducting and Normal StatesReceived 20 March 2003; published 14 October 2003 Angle-resolved photoemission spectroscopy is used to study the mass renormalization of the charge carriers in the high-Tc superconductor (Pb,Bi)2Sr2CaCu2O8 in the vicinity of the (π,0) point in the superconducting and the normal states. Using matrix element effects at different photon energies and due to a high momentum and energy resolution the bonding and the antibonding bands could be separated in the whole dopant range. A huge coupling to a bosonic collective mode is observed below Tc for both bands, in particular, for the underdoped case. Above Tc, a weaker coupling to a continuous spectrum of modes is detected. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.167002
DOI:
10.1103/PhysRevLett.91.167002
PACS:
74.25.Jb, 74.72.–h, 79.60.–i
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