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Renormalization of Spectral Line Shape and Dispersion below Tc in Bi2Sr2CaCu2O8+δ

A. Kaminski, M. Randeria, J. C. Campuzano, M. R. Norman, H. Fretwell, J. Mesot, T. Sato, T. Takahashi, and K. Kadowaki
Phys. Rev. Lett. 86, 1070 – Published 5 February 2001
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Abstract

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

  • Received 26 April 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.1070

©2001 American Physical Society

Authors & Affiliations

A. Kaminski1,2, M. Randeria3, J. C. Campuzano1,2, M. R. Norman2, H. Fretwell4, J. Mesot5, T. Sato6, T. Takahashi6, and K. Kadowaki7

  • 1Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607
  • 2Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439
  • 3Tata Institute of Fundamental Research, Mumbai 400005, India
  • 4Department of Physics, University of Wales Swansea, Swansea SA2 8PP, United Kingdom
  • 5Laboratory for Neutron Scattering, ETH Zurich and PSI Villigen, CH-5232 Villigen PSI, Switzerland
  • 6Department of Physics, Tohoku University, 980 Sendai, Japan
  • 7Institute of Materials Science, University of Tsukuba, Ibaraki 305, Japan

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Vol. 86, Iss. 6 — 5 February 2001

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