Bosonic Spectral Function and the Electron-Phonon Interaction in HTSC Cuprates

Table 1

Phonon frequency 𝜔, EPI coupling constant 𝜆_𝑖 of the peaks 𝑃1-𝑃13, and contribution Δ𝑇_𝑐 to 𝑇_𝑐 of each peak in 𝛼²𝐹(𝜔)—as shown in Figure 24—obtained from the tunnelling conductance of Bi₂Sr₂CaCu₂O₈. Δ𝑇_𝑐 is the decrease in 𝑇_𝑐 when the peak in 𝛼²𝐹(𝜔) is eliminated. From [53, 54].

No. of peak	𝜔 [meV]	𝜆𝑖	Δ𝑇𝑐 [K]
𝑃1	14.3	1.26	7.4
𝑃2	20.8	0.95	11.0
𝑃3	31.7	0.48	10.5
𝑃4	35.1	0.28	6.7
𝑃5	39.4	0.24	7.0
𝑃6	45.3	0.30	10.0
𝑃7	58.3	0.15	6.5
𝑃8	63.9	0.01	0.6
𝑃9	69.9	0.07	3.6
𝑃10	73.7	0.06	3.3
𝑃11	77.3	0.01	0.8
𝑃12	82.1	0.01	0.7
𝑃13	87.1	0.03	1.8