Fine details of the nodal electronic excitations in Bi2 Sr2 Ca Cu2 O8+δ
Physical Review B - Condensed Matter and Materials Physics
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.
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DOI of published version
Valla, T.; Kidd, T. E.; Rameau, J. D.; Noh, H. J.; Gu, G. D.; Johnson, P. D.; Yang, H. B.; and Ding, H., "Fine details of the nodal electronic excitations in Bi2 Sr2 Ca Cu2 O8+δ" (2006). Faculty Publications. 2789.