Superconductivity-Induced Self-Energy Evolution of the Nodal Electron of Optimally Doped Bi(2)Sr(2)Ca(0.92)Y(0.08)Cu(2)O(8+Delta)
The temperature dependent evolution of the renormalization effect in optimally doped Bi{sub 2}Sr{sub 2}Ca{sub 0.92}Y{sub 0.08}Cu{sub 2}O{sub 8+{delta}} along the nodal direction has been studied via angle-resolved photoemission spectroscopy. Fine structure is observed in the real part of the self-energy (Re{Sigma}), including a subkink and maximum, suggesting that electrons couple to a spectrum of bosonic modes, instead of just one mode. Upon cooling through the superconducting phase transition, the fine structures of the extracted Re{Sigma} exhibit a two-processes evolution demonstrating an interplay between kink renormalization and superconductivity. We show that this two-process evolution can be qualitatively explained by a simple Holstein model in which a spectrum of bosonic modes is considered.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 953087
- Report Number(s):
- SLAC-REPRINT-2009-197; TRN: US200914%%191
- Journal Information:
- Phys.Rev.B77:140504,2008, Vol. 77, Issue 14; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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