Identification of a New Form of Electron Coupling in Bi2Sr2CaCu2O8 Superconductor by Laser-Based Angle-Resolved Photoemission

Abstract

Laser-based angle-resolved photoemission measurements with super-high resolution have been carried out on an optimally-doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ high temperature superconductor. New high energy features at $\sim$115 meV and $\sim$150 meV, besides the prominent $\sim$70 meV one, are found to develop in the nodal electron self-energy in the superconducting state. These high energy features, which can not be attributed to electron coupling with single phonon or magnetic resonance mode, point to the existence of a new form of electron coupling in high temperature superconductors.

4 pages, 4 figures

References in corpus (11)

• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• A universal high energy anomaly in angle resolved photoemission spectra of high temperature superconductors - possible evidence of spinon and holon branches
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• High-energy kink in high-temperature superconductors
• The hierarchy of multiple many-body interaction scales in high-temperature superconductors
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• High-energy scale revival and giant kink in the dispersion of a cuprate superconductor
• "Waterfalls" in cuprates
• "Waterfalls" phenomenon in superconducting cuprates

Cited by in corpus (15)

• Intermediate Coupling Model of the Cuprates
• Ultrafast quenching of electron-boson interaction and superconducting gap in a cuprate superconductor
• Extremely Correlated Fermi Liquid Description of Normal State ARPES in Cuprates
• Characteristics of oxygen isotope substitutions in the quasiparticle spectrum of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Absence of a BCS-BEC crossover in the cuprate superconductors
• Quantitative Determination of Eliashberg Function and Evidence of Strong Electron Coupling with Multiple Phonon Modes in Heavily Over doped (Bi,Pb)2Sr2CuO6
• Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
• Resolving unoccupied electronic states with laser ARPES in bismuth-based cuprate superconductors
• Selective Hybridization between Main Band and Superstructure Band in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Superconductor
• Reverse process of usual optical analysis of boson-exchange superconductors: impurity effects on $s$- and $d$-wave superconductors
• Crossover from inelastic magnetic scattering of Cooper pairs to spin-wave dispersion produces low-energy kink in cuprates
• High energy fluctuation spectra in cuprates from infrared optical spectroscopy
• Electron-boson spectral density of LiFeAs obtained from optical data
• Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor
• Expansion of Momentum Space and Full 2$\pi$ Solid Angle Photoelectron Collection in Laser-Based Angle-Resolved Photoemission Spectroscopy by Applying Sample Bias