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- W1597967508 abstract "We show that the double kink-structure in the electronic self-energy of Bi2212 near the nodal point at low energy $omega_{1}approx 50-70$ $meV$ and at high energy at $omega_{2}approx 350$ $meV$, observed recently in the ARPES measurements by Valla et al cite{Valla-2006}, gives that the electron-phonon (EPI) coupling constant $lambda_{z}^{EP}$in the normal part of the self-energy $Sigma (omega)$ is twice larger than the Coulomb coupling $lambda_{z}^{C}$. The experimental data for $func{Re}Sigma (omega)$ up to energies $sim 350$ $meV$ can be satisfactory explained by $% lambda_{z}^{EP}approx 2.1$ and $lambda_{z}^{C}approx 1.1$. Additionally the low energy slope of the ARPES $func{Re}Sigma (omega)$ at $omega 1$, thus giving the total EPI coupling constant $lambda_{z,tot}^{EP}=lambda_{z}^{EP}+lambda_{z}^{low,EP}>3$. In order to test the role of low frequency phonons by ARPES measurements a much better momentum resolution is needed than that reported in cite{Valla-2006}. Possible pairing scenarios based on ARPES, tunnelling and magnetic neutron scattering measurements are discussed." @default.
- W1597967508 created "2016-06-24" @default.
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- W1597967508 date "2006-10-19" @default.
- W1597967508 modified "2023-09-27" @default.
- W1597967508 title "ARPES Spectra of Bi2212 give the Coulomb Coupling $lambda ^{C}approx 1$ and the Electron-Phonon Coupling $lambda ^{EP}=2-3$" @default.
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