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Strong Influence of Phonons on the Electron Dynamics of Bi2212

G. -H. Gweon·S. Y. Zhou·A. Lanzara
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Abstract

The sudden change of the velocity, so-called "kink," of the dispersing peak in angle resolved photoelectron spectroscopy is a well-known feature in the high temperature superconducting cuprates. Currently, the origin of the kink is being much debated, but a consensus has not emerged yet. Here, we present a study of the momentum evolution of the kink structure from the nodal region towards the anti-nodal region, for optimally doped Bi2212 sample. We show that the observed temperature dependence of the kink structure in both regions of the momentum space is consistent with a scenario in which phonons contribute strongly to the kink.

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G. -H. Gweon, S. Y. Zhou, A. Lanzara. 2004-08-22. Strong Influence of Phonons on the Electron Dynamics of Bi2212. https://doi.org/10.1016/j.jpcs.2003.12.017

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