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

A. Kaminski·M. Randeria·J. C. Campuzano·M. R. Norman·H. Fretwell·J. Mesot·T. Sato·T. Takahashi·K. Kadowaki
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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.

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A. Kaminski, M. Randeria, J. C. Campuzano, M. R. Norman, H. Fretwell, J. Mesot, T. Sato, T. Takahashi, K. Kadowaki. 2000-08-13. Renormalization of spectral lineshape and dispersion below Tc in Bi2Sr2CaCu2O8+d. https://doi.org/10.1103/physrevlett.86.1070

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