Reviews of topical problems

Electron — phonon coupling in underdoped high-temperature superconductors

Cross-Correlated Materials Research Group (CMRG), ASI, RIKEN, Wako, Saitama , Japan

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.

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Fulltext is also available at DOI: 10.3367/UFNe.0179.200912b.1259
PACS: 71.38.−k, 74.20.−z, 74.72.−h (all)
DOI: 10.3367/UFNe.0179.200912b.1259
Citation: Mishchenko A S "Electron — phonon coupling in underdoped high-temperature superconductors" Phys. Usp. 52 1193–1212 (2009)
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Оригинал: Мищенко А С «Электрон-фононное взаимодействие в недодопированных высокотемпературных сверхпроводниках» УФН 179 1259–1280 (2009); DOI: 10.3367/UFNr.0179.200912b.1259

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