Giant Electron-Phonon Anomaly in Doped La₂CuO₄and Other Cuprates

Figure 5

(a, b): Evolution of the neutron-scattering profile measured on YNi₂B₂C at 𝐐=(0.5,0.5,7) (left) and 𝐐=(0.5,0,8) (right) above and below 𝑇_𝑐=15 K. (c, d): Thin lines represent calculated phonon lineshapes based on the theory of Allen et al. [19], using parameters extracted from the line-shape observed in the normal state. The thick lines are obtained after the convolution with the experimental resolution (from [20]).

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