Bosonic Spectral Function in HTSC Cuprates: Part I - Experimental Evidence for Strong Electron-Phonon Interaction

Maksimov, E. G.; Kulic, M. L.; Dolgov, O. V.

Bosonic Spectral Function in HTSC Cuprates: Part I - Experimental Evidence for Strong Electron-Phonon Interaction

Authors

Maksimov, E. G.

Kulic, M. L.

Dolgov, O. V.

Description

In Part I we discuss accumulating experimental evidence related to the structure and origin of the bosonic spectral function α^{2}F in high-temperature superconducting (HTSC) cuprates near optimal doping. Some global properties of α^{2}F such as number and positions of peaks, are extracted by combining optics, neutron scattering, ARPES and tunnelling measurements. These methods give convincing evidence for strong electron-phonon interaction (EPI) with 1<λ\lesssim 3 in cuprates near optimal doping. Here we clarify how these results are in favor of the Eliashberg-like theory for HTSC cuprates near optimal doping.We argue that the neglect of EPI in some previous studies of HTSC was based on a number of deceptive prejudices related to the strength of EPI, on some physical misconceptions and misleading interpretation of experimental results.
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