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

Figure 7

(a) EDCs taken on optimally doped samples with different oxygen isotopes at = 25 K. The EDCs are from the same cut as in Figure 6 and indicated by the inset. The sharp coherent peak (CP) near and broader incoherent peak (IP) at higher energy are identified. The CP has nearly no isotope dependence while the IP has a more substantial IE, most strongly seen in curve 4. The small peak at in curve 6 is the well-known superstructure (SS) replica of the main band. This figure is from [33]. (b) MDC dispersion taken to higher binding energy indicating that the IE, more pronounced for the IP as in (a), disappears again above roughly 2-3 times the antiferromagnetic coupling energy, .

(a)

(b)