期刊
PHYSICAL REVIEW LETTERS
卷 91, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.91.167002
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Angle-resolved photoemission spectroscopy is used to study the mass renormalization of the charge carriers in the high-T-c superconductor (Pb,Bi)(2)Sr2CaCu2O8 in the vicinity of the (pi,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 T-c for both bands, in particular, for the underdoped case. Above T-c, a weaker coupling to a continuous spectrum of modes is detected.
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