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

Figure 20

(a) Nodal point MDC dispersions taken from - cuts on four different samples of increasing strain (La, Pr, Nd, and Eu). Lines serve as guides to determine deviation from the expected dispersion. Horizontal shaded regions correspond to the two potential ARPES kink energy scales. (b-c) Estimating the electron coupling on the electronic states from each of the two regions indicated in (a). (b1) and (b2) Higher energy kink for each strain as a function of () Lattice mismatch , and () . (c1) and (c2) Lower energy kink analyzed like (b).

(a)

(b)