]>Manifestations of the Electron-Phonon Coupling in the Spectroscopy of High-Temperature Superconductors : Figure 9
306106.fig.009a
(a)
306106.fig.009b
(b)
306106.fig.009c
(c)
306106.fig.009d
(d)
Figure 9: Typical OC of different models in two-dimensions and experimental data in weakly doped system: (a) Holstein model at 𝜆 = 0 . 4 4 ; (b) t-J model at 𝐽 = 0 . 3 ; (c) t-J-H at 𝐽 = 0 . 3 and 𝜆 = 0 . 3 9 ; (d) in-plane OC of doped by 𝑥 = 1 . 5 % holes Eu 1 − 𝑥 Ca 𝑥 Ba 2 Cu 3 O 6 at 𝑇 = 1 0  K. Theoretical energy scale assumes 𝑡 = 0 . 3  eV (1 eV = 8065.5 cm − 1 ). The absolute values of the theoretical 𝜎 1 estimated assuming that hopping distance in plane is 𝑎 = 3 . 8 6  Å and the bulk concentration of holes is 𝑛 ℎ = 1 . 7 2 × 1 0 − 2 3  cm − 3 .