Renormalization of spectral lineshape and dispersion below Tc in Bi2Sr2CaCu2O8+d

Abstract

Angle-resolved photoemission (ARPES) data in the superconducting state of Bi2Sr2CaCu2O8+d show a kink in the dispersion along the zone diagonal, which is related via a Kramers-Kronig analysis to a drop in the low-energy scattering rate. As one moves towards (pi,0), this kink evolves into a spectral dip. The occurrence of these anomalies in the dispersion and lineshape throughout the zone indicate the presence of a new energy scale in the superconducting state.

New Figure 3 with expanded discussion

References in corpus (8)

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• Electronic Spectra and Their Relation to the (pi,pi) Collective Mode in High-Tc Superconductors
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• The neutron resonance: modeling photoemission and tunneling data in the superconducting state of Bi_2Sr_2CaCu_2O_{8+d}
• Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8
• Extraction of the Electron Self-Energy from Angle Resolved Photoemission Data: Application to Bi2212

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