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

Figure 2

Phonon dispersion in the (1,0) and (1,1) directions. Experimental results are shown by dotted lines for 𝑥=0 and 𝑥=0.15. Theoretical results (full curve) are shown for 𝑥=0.125. The bars in theoretical results show the spread due to different boundary conditions, after Rösch and Gunnarsson [61].