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

Abstract

Super-high resolution laser-based angle-resolved photoemission measurements have been carried out on Bi2Sr2CaCu2O8+d (Bi2212) superconductors to investigate momentum dependence of electron coupling with collective excitations (modes). Two coexisting energy scales are clearly revealed over a large momentum space for the first time in the superconducting state of an overdoped Bi2212 superconductor. These two energy scales exhibit distinct momentum dependence: one keeps its energy near 78 meV over a large momentum space while the other changes its energy from $\sim$40 meV near the antinodal region to $\sim$70 meV near the nodal region. These observations provide a new picture on momentum evolution of electron-boson coupling in Bi2212 that electrons are coupled with two sharp modes simultaneously over a large momentum space in the superconducting states. Their unusual momentum dependence poses a challenge to our current understanding of electron-mode-coupling and its role for high temperature superconductivity in cuprate superconductors.

arXiv comment14 Pages, 4 Figures

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Cited by in corpus (23)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Inequivalence of Single-Particle and Population Lifetimes in a Cuprate Superconductor
• Ultrafast quenching of electron-boson interaction and superconducting gap in a cuprate superconductor
• Distinct Superconducting Gap on Two Bilayer-Split Fermi Surface Sheets in $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$ Superconductor
• Direct observation of self energy signatures of the resonant collective mode in Bi2Sr2CaCu2O8
• 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
• Origin of Kinks in Energy Dispersion of Strongly Correlated Matter
• Sharp low energy feature in single-particle spectra due to forward scattering in $d$-wave cuprate superconductors
• 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${}_{4+\delta }$
• Selective Hybridization between Main Band and Superstructure Band in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Superconductor
• Low-temperature T-linear resistivity in the strange metal phase of overdoped cuprate superconductors due to umklapp scattering from a spin excitation
• How to pin down the pairing interaction for high Tc superconductivity in cuprates
• Renormalization of electrons in bilayer cuprate superconductors
• Glue function of optimally and overdoped cuprates from inversion of the Raman spectra
• Evidence for bosonic mode coupling in electron dynamics of LiFeAs superconductor
• Effect of short-range correlations on spectral properties of doped Mott insulators
• Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T${}_{\text{c}}$ cuprate superconductors
• Quantitative Determination of the Pairing Interactions for High Temperature Superconductivity in Cuprates
• Origin of insulating-like behavior of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ under pressure: A first-principles study
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors
• Antinodal kink in the band dispersion of electron-doped cuprate ${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_{4\pm \delta }$