Giant Electron-Phonon Anomaly in Doped La₂CuO₄and Other Cuprates

Figure 13

Inelastic X-ray scattering spectra of La_1.86Ba_0.14CuO_4+δ, at Q = (3+𝑞_𝑥, 𝑞_𝑦, 0) (𝑞_𝑦<0.04). In the left column a single peak is used to fit the data. In the right column the data are fitted with two Cu–O bond stretching modes (from [39]).

(a)

(b)