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Fine Details of the Nodal Electronic Excitations in Bi2Sr2CaCu2O8+δ
Physical Review B (2005)
  • T. Valla
  • Timothy E. Kidd, University of Northern Iowa
  • J.D. Rameau
  • H.J. Noh
  • G.D. Gu
  • P.D. Johnson
  • H.B. Yang
  • H. Ding
Very high energy resolution photoemission experiments on high quality samples of optimally doped Bi2Sr2CaCu2O8+δ show new features in the low-energy electronic excitations. A marked change in the binding energy and temperature dependence of the near-nodal scattering rates is observed near the superconducting transition temperature, TC. The temperature slope of the scattering rate measured at low energy shows a discontinuity at TC. In the superconducting state, coherent excitations are found with the scattering rates showing a cubic dependence on frequency and temperature. The superconducting gap has a d-wave magnitude with negligible contribution from higher harmonics. Further, the bilayer splitting has been found to be finite at the nodal point.
Publication Date
December 28, 2005
Citation Information
T. Valla, Timothy E. Kidd, J.D. Rameau, H.J. Noh, et al.. "Fine Details of the Nodal Electronic Excitations in Bi2Sr2CaCu2O8+δ" Physical Review B Vol. 73 Iss. 18 (2005)
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