Manifestations of the Electron-Phonon Coupling in the Spectroscopy of High-Temperature Superconductors

Figure 1

Quasiparticle dispersion in the direction (0,0)−(𝜋,𝜋) in the compounds La2−𝑥Sr𝑥CuO4 (LSCO), Bi2Sr2CuO6 (Bi2201), and Bi2Sr2CaCu2O8 (Bi2212) at different temperatures and dopings. Panel (f) shows the value 1+𝜆^′, evaluated by the change of the dispersion angle in the weak coupling theory for noninteracting electrons in metal, after Lanzara et al. [64].

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