Abstract
Angle resolved photoemission spectroscopy combined with isotope substitution (16O→18O) sample preparation method is used to probe the effect of the lattice degrees of freedom on the electron dynamics of optimally doped Bi2Sr2CaC2O8+δ high temperature superconductors, as a function of momentum and temperature. Our data show that the lattice dynamics strongly renormalizes the electron dispersion and the photoemission line shapes. The renormalization is enhanced near the anti-nodal region and in the superconducting state, i.e. as the superconducting gap opens up. This unusual behavior is direct evidence that the electron-phonon interaction is correlated with the electron pairing in the high temperature superconductivity.
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Lanzara, A., Gweon, GH., Zhou, S.Y. (2005). Lattice Dynamics and Electron Pairing in High Temperature Superconductors. In: Ashkenazi, J., et al. New Challenges in Superconductivity: Experimental Advances and Emerging Theories. NATO Science Series II: Mathematics, Physics and Chemistry, vol 183. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3085-1_1
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DOI: https://doi.org/10.1007/1-4020-3085-1_1
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