Superconductivity-Induced Self-Energy Evolution of the Nodal Electron of Optimally-Doped Bi2212

Abstract

The temperature dependent evolution of the renormalization effect in optimally-doped Bi2212 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.

4 page 3 figures,submitted ro PRB

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• An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates
• Determinant quantum Monte Carlo study of the two-dimensional single-band Hubbard-Holstein model
• Inequivalence of Single-Particle and Population Lifetimes in a Cuprate Superconductor
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• Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure
• Signatures of superconductivity and pseudogap formation in non-equilibrium nodal quasiparticles revealed by ultrafast angle-resolved photoemission
• Coexistence of Two Sharp-Mode Couplings and Their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+d Superconductor Revealed by Laser-Based Angle-Resolved Photoemission
• Quasi-particles ultrafastly releasing kink bosons to form Fermi arcs in a cuprate superconductor
• Extraction of Electron Self-Energy and Gap Function in the Superconducting State of Bi_2Sr_2CaCu_2O_8 Superconductor via Laser-Based Angle-Resolved Photoemission
• Density of States Modulations from Oxygen Phonons in d-wave Superconductors: Reconciling Angle-Resolved Photoemission Spectroscopy and Scanning Tunneling Microscopy
• Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
• Large momentum-dependence of the main dispersion "kink" in the high-Tc superconductor Bi2Sr2CaCu2O8+δ
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Three interaction energy scales in single-layer high-T${}_C$ cuprate HgBa${}_2$CuO${}_{4+\delta }$
• Effect of electron-phonon coupling in the ARPES spectra of the tri-layer cuprate Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• Identifying a forward scattering superconductor through pump-probe spectroscopy