Anomalous Enhancement of the Coupling to the Magnetic Resonance Mode in Underdoped Pb-Bi2212

S. V. Borisenko, A. A. Kordyuk, T. K. Kim, A. Koitzsch, M. Knupfer, J. Fink, M. S. Golden, M. Eschrig, H. Berger, and R. Follath
Phys. Rev. Lett. 90, 207001 – Published 19 May 2003

Abstract

High-resolution angle-resolved photoemission with variable excitation energies is used to disentangle bilayer splitting effects and intrinsic (self-energy) effects in the electronic spectral function near the (π,0) point of differently doped (Pb,Bi)2Sr2CaCu2O8+δ. In contrast to overdoped samples, where intrinsic effects at the (π,0) point are virtually absent, we find in underdoped samples intrinsic effects in the superconducting-state (π,0) spectra of the antibonding band. This intrinsic effect is present only below the critical temperature and weakens considerably with doping. Our results give strong support for models which involve a strong coupling of electronic excitations with the resonance mode seen in inelastic neutron scattering experiments.

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  • Received 18 September 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.207001

©2003 American Physical Society

Authors & Affiliations

S. V. Borisenko1, A. A. Kordyuk1,2, T. K. Kim1, A. Koitzsch1, M. Knupfer1, J. Fink1, M. S. Golden1,3, M. Eschrig4, H. Berger5, and R. Follath6

  • 1Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, D-01171 Dresden, Germany
  • 2Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
  • 3Van der Waals-Zeeman Institute, University of Amsterdam, NL-1018 XE Amsterdam, The Netherlands
  • 4Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany
  • 5Institute of Physics of Complex Matter, EPFL, CH-1015 Lausanne, Switzerland
  • 6BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany

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Vol. 90, Iss. 20 — 23 May 2003

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