Electron-phonon interaction in the new superconductors La2−x(Ba,Sr)xCuO4

Werner Weber

doi:10.1103/PhysRevLett.58.1371

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Electron-phonon interaction in the new superconductors La2−x(Ba,Sr)xCuO4

Werner Weber

DOI 10.1103/PhysRevLett.58.1371 · Physical Review Letters

T1

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Abstract

A realistic tight-binding theory, based on the first-principles energy-band results of Mattheiss, is used to study the electron-phonon interaction in the new high-Tc superconductors La2−x(Ba,Sr)xCuO4. The calculated results include the phonon dispersion curves, phonon linewidths, the Eliashberg function α2(ω)F(ω), and the interaction constant λ. A very strong couplin of specific O phonons to the conduction electrons is found (λ≥2), leading—because of the light oxygen mass—to Tc values of ∼30-40 K.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-x(Ba,Sr)xCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	unknown
La2-x(Ba,Sr)xCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure unresolved	unknown