]>Manifestations of the Electron-Phonon Coupling in the Spectroscopy of High-Temperature Superconductors : Figure 11
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Figure 11: (a) Energies of the dominant MIR peak (solid line with circles) and low-energy peak (dashed line with squares) of the t-J-H model versus 𝜆 . Energies of the dominant peaks of the Holstein model for 𝑡 = 1 (dashed line) and for ̃ 𝑡 = 0 . 4 (solid line). (b) OC of the t-J-H model (solid line) and effective Holstein model with ̃ 𝑡 = 0 . 4 (dashed line). Both OC are for 𝜆 = 0 . 1 . (c) and (d) Ratio of the effective coupling constants on doping 𝑥 (or real concentration 𝑝 of the hole in plain for YBCO [244]) and that at almost zero doping. Effective 𝜆 ( 𝑥 ) is determined by the fit of the MIR position at given doping.