Faculty Publications

Title

Fine details of the nodal electronic excitations in Bi2 Sr2 Ca Cu2 O8+δ

Document Type

Article

Journal/Book/Conference Title

Physical Review B - Condensed Matter and Materials Physics

Volume

73

Issue

18

Abstract

Very high energy resolution photoemission experiments on high quality samples of optimally doped Bi2 Sr2 Ca Cu2 O8+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. © 2006 The American Physical Society.

Original Publication Date

5-25-2006

DOI of published version

10.1103/PhysRevB.73.184518

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