Manifestations of the Electron-Phonon Coupling in the Spectroscopy of High-Temperature Superconductors

Figure 3

(a) Lehmann spectral function L of the ground state at 𝐤=(𝜋/2,𝜋,2) for 𝐽/𝑡=0.3 and 𝜆=0. Low-energy spectral function L in the ground state 𝐤=(𝜋/2,𝜋,2) at 𝐽/𝑡=0.3: (b) 𝜆=0; (c) 𝜆=0.3; (d) 𝜆=0.4; (e) 𝜆=0.46. 𝜆-dependence at 𝐽/𝑡=0.3: (f) energies of the lowest resonances; (g) 𝑍-factor of the lowest resonance; (h) average number of phonons.