Results indicating the important role of the electron — phonon coupling in high-temperature superconductivity compounds are presented, with emphasis on its implications for angle-resolved photoemission and optical conductivity. The dimensionless phonon coupling constant λ is determined by comparing the experimental and theoretical results. Although undoped materials are in the strong-coupling (λ ~ 1) regime, hole doping decreases λ, bringing compounds to the intermediate-coupling regime at optimum hole concentrations.

PACS: 71.38.−k, 74.20.−z, 74.72.−h (all) DOI: 10.3367/UFNe.0179.200912b.1259 URL: https://ufn.ru/en/articles/2009/12/b/ 000285142600001 2-s2.0-77949707223 2009PhyU...52.1193M Citation: Mishchenko A S "Electron — phonon coupling in underdoped high-temperature superconductors" Phys. Usp. 52 1193–1212 (2009) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Оригинал: Мищенко А С «Электрон-фононное взаимодействие в недодопированных высокотемпературных сверхпроводниках» УФН 179 1259–1280 (2009); DOI: 10.3367/UFNr.0179.200912b.1259