ARPES kink is a "smoking gun" for the theory of high-Tc superconductors: dominance of the electron-phonon interaction with forward scattering peak

Abstract

The ARPES spectra in high-Tc superconductors show four distinctive features in the quasiparticle self-energy. All of them can be explained consistently by the theory in which the electron phonon interaction (EPI) with the forward scattering peak dominates over the Coulomb scattering. In particular, this theory explains why there is no shift of the nodal kink at 70 meV in the superconducting state, contrary to the clear shift of the anti-nodal singularity at 40 meV. The theory predicts a ``knee''-like structure of the imaginary part of the self-energy, which is phonon dominated for $\omega \approx {\omega }_{ph}^{(70)}$, and shows linear behavior for $\omega >{\omega }_{ph}^{(70)}$ - due to the Coulomb scattering. Recent ARPES spectra give that the EPI coupling constant is much larger than the Coulomb one. The dip-hump structure in the spectral function comes out naturally from the proposed theory.

5 pages, 3 figures

References in corpus (6)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Coupling Of The B1g Phonon To The Anti-Nodal Electronic States of Bi2Sr2Ca0.92Y0.08Cu2O(8+delta)
• ARPES and optical renormalizations: phonons or spin fluctuations
• High-T_{c} Superconductors with AF Order: Limitations on Spin-Fluctuation Pairing Mechanism
• Manifestation of marginal Fermi liquid and phonon excitations in photoemision experiments of cuprate superconductors

Cited by in corpus (11)

• Interplay between electron-phonon and Coulomb interactions in cuprates
• Ultrafast quenching of electron-boson interaction and superconducting gap in a cuprate superconductor
• Bosonic Spectral Function and The Electron-Phonon Interaction in HTSC Cuprates
• Superconductivity-Induced Self-Energy Evolution of the Nodal Electron of Optimally-Doped Bi2212
• 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
• Charge density waves as the origin of dip-hump structures in differential tunneling conductance of cuprates: the case of $d$-wave superconductivity
• Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
• Sum rules and vertex corrections for electron-phonon interactions
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Role of dynamical non-double-occupancy excitations on the quasiparticle damping of the $t-J$ model in the large-$N$ limit
• High Temperature Superconductivity - Magnetic Mechanisms