Coupling of low-energy electrons in the optimally doped Bi2Sr2CaCu2O8+δ superconductor to an optical phonon mode

J. D. Rameau; H.-B. Yang; G. D. Gu; P. D. Johnson

doi:10.1103/PhysRevB.80.184513

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Coupling of low-energy electrons in the optimally doped Bi2Sr2CaCu2O8+δ superconductor to an optical phonon mode

J. D. Rameau, H.-B. Yang, G. D. Gu, P. D. Johnson

DOI 10.1103/PhysRevB.80.184513 · Physical Review B

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Abstract

Laser-based photoemission with photons of energy 6 eV is used to examine the fine details of the very low-energy electron dispersion and associated dynamics in the nodal region of optimally doped Bi2212. A “kink” in the dispersion in the immediate vicinity of the Fermi energy is associated with scattering from an optical phonon previously identified in Raman studies. The identification of this phonon as the appropriate mode is confirmed by comparing the scattering rates observed experimentally with the results of calculated scattering rates based on the properties of the phonon mode.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown