Strong and complex electron-lattice correlation in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$

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dc.creatorGweon, G. -H.
dc.creatorZhou, S. Y.
dc.creatorWatson, M. C.
dc.creatorSasagawa, T.
dc.creatorTakagi, H.
dc.creatorLanzara, A.
dc.date2007-01-14
dc.date.accessioned2026-07-07T07:40:49Z
dc.date.available2026-07-07T07:40:49Z
dc.descriptionWe discuss the nature of electron-lattice interaction in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ samples, using isotope effect (IE) in angle resolved photoemission spectroscopy (ARPES) data. The IE in the ARPES line width and the IE in the ARPES dispersion are both quite large, implying a strong electron-lattice correlation. The strength of the electron-lattice interaction is ``intermediate,'' i.e. stronger than the Migdal-Eliashberg regime but weaker than the small polaron regime, requiring a more general picture of the ARPES ``kink'' than the commonly used Migdal-Eliashberg picture. The two IEs also imply a complex interaction, due to their strong momentum dependence and their differing sign behaviors. In sum, we propose an intermediate-strength coupling of electrons to localized lattice vibrations via charge density fluctuations.
dc.identifierhttps://arxiv.org/abs/cond-mat/0701291
dc.identifierhttp://arxiv.org/abs/cond-mat/0701291
dc.identifierPhys. Rev. Lett. vol. 97, 227001 (2006)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/121895
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleStrong and complex electron-lattice correlation in optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$
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