Through a Lattice Darkly: Shedding Light on Electron-Phonon Coupling in the High Tc Cuprates

Figure 6

(a-b) MDC maps of the nodal point electronic states for cuts along the - direction. (a) The O sample and (b) the O substituted sample with the horizontal arrows indicating the shift in ARPES kink energy with oxygen isotope. (c) The MDC dispersions determined from the O, O, as well as a resubstituted O samples for the cuts in (a-b). (d) Cartoon illustration of the kink shift in (c). (e) Real part of the electron self-energy, Re, determined from the MDC dispersion using a linear approximation for the single electron bare band. As before, the ARPES kink position, defined by the peak in Re, is shifted to higher energy as indicated by the arrows.