Abstract Details 125

Temporal and Spectral Signatures of Electron-Phonon Interactions in Cuprates
Abstract ID 125
Presenter Shuolong Yang
Presentation Type Poster
Full Author List Jonathan Sobota, Dominik Leuenberger, Yu He, Makoto Hashimoto, Donghui Lu, Hiroshi Eisaki, Patrick Kirchmann, Zhi-Xun Shen

Stanford University


We employ femtosecond time-resolved photoelectron spectroscopy to directly uncover the time-domain signatures of electron-phonon interactions in a cuprate superconductor. We discover an abrupt decrease of the electron lifetime above a characteristic energy of 55 ± 8 meV. Remarkably, the lifetime at this energy is independent of excitation density. By fundamental considerations of electron-phonon interactions, these behaviors are explained by coupling with a 55 meV mode which scatters nodal electrons to the nodal region in momentum space. Our experiment complements equilibrium photoemission by providing sensitivity to sub-dominant mode coupling, and suggests a pathway towards the full description of bosonic mode coupling in cuprates.



Funding Acknowledgement