Giant Electron-Phonon Anomaly in Doped La₂CuO₄and Other Cuprates

Figure 20

Schematic of the eigenvectors for the phonons with q = (0.25 0 0) propagating perpendicular (a) and parallel (b) to the stripes. Open circles represent hole-poor antiferromagnetic regions, while the filled circles represent the hole-rich lines (from [37]).

(a)

(b)