Resonant Inelastic X-ray Scattering Study of Electron-Exciton Coupling in High-Tc Cuprates

  title={Resonant Inelastic X-ray Scattering Study of Electron-Exciton Coupling in High-Tc Cuprates},
  author={Francesco Barantani and Micha{\"e}l K Tran and I. Madan and Itzik Kapon and Nimrod Bachar and A. T. C. Asmara and Eugenio Paris and Y. Tseng and W. Zhang and Y. Hu and Enrico Giannini and Genda Gu and T. P. Devereaux and Christophe Berthod and Fabrizio Carbone and T.Schmitt and D. van der Marel},
Explaining the mechanism of superconductivity in the high- T c cuprates requires an understanding of what causes electrons to form Cooper pairs. Pairing can be mediated by phonons, the screened Coulomb force, spin or charge fluctuations, excitons, or by a combination of these. An excitonic pairing mechanism has been postulated, but experimental evidence for coupling between conduction electrons and excitons in the cuprates is sporadic. Here we use resonant inelastic x-ray scattering (RIXS) to… 



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