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

Figure 18

(a) MDC dispersions measured for three different momentum cuts along the - orientation with cut 1 at the nodal point while cuts 2 and 3 are further toward the BZ boundary, near to the edge of the pseudogap phase Fermi arrows [65]. (b) Fermi surface with the cuts from (a) indicated. The solid line indicates a constant energy contour at the kink energy, 63 meV, while the shadow area indicates the region where the nodal kink appears bounded by the indicated nesting wavevectors. The inset shows the IXS dispersion and peak FWHM (seen as error bars) of the BS mode. Note: The apparent Fermi arcs due to the experimental resolution are indicated by the curved arrows. The complete figures can be found in [62].

(a)

(b)