Nature of the nodal kink in angle-resolved photoemission spectra of cuprate superconductors
Nature of the nodal kink in angle-resolved photoemission spectra of cuprate superconductors
The experimental finding of an ubiquitous kink in the nodal direction of angle-resolved photoemission spectroscopies of superconducting cuprates has been reproduced theoretically. Our model is built upon the Migdal-Eliashberg theory for the electron self-energy within the phonon-coupling scenario. Following this perturbative approach, a numerical evaluation of the bare band dispersion …