Fine Details of the Nodal Electronic Excitations in Bi2Sr2CaCu2O8+gamma
Very high energy resolution photoemission experiments on high quality samples of optimally doped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} 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, T{sub C}. 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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 913982
- Report Number(s):
- BNL-78550-2007-JA; PRBMDO; TRN: US0801449
- Journal Information:
- Phys. Rev. B, Vol. 73; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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