Probing Electronic Fluxes via Time-Resolved X-ray Scattering

Abstract : The current flux density is a vector field that can be used to describe theoretically how electrons flow in a system out-of-equilibrium. In this work, we unequivocally demonstrate that the signal obtained from time-resolved X-ray scattering does not only map the time-evolution of the electronic charge distribution, but also encodes information about the associated electronic current flux density. We show how the electronic current flux density qualitatively maps the distribution of electronic momenta and reveals the underlying mechanism of ultrafast charge migration processes, while also providing quantitative information about the timescales of electronic coherences.
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https://hal.univ-lorraine.fr/hal-02267300
Contributor : Jean Christophe Tremblay <>
Submitted on : Monday, August 19, 2019 - 10:52:51 AM
Last modification on : Friday, September 20, 2019 - 4:36:45 PM

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  • HAL Id : hal-02267300, version 1
  • ARXIV : 1907.00891

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Gunter Hermann, Vincent Pohl, Gopal Dixit, Jean Christophe Tremblay. Probing Electronic Fluxes via Time-Resolved X-ray Scattering. 2019. ⟨hal-02267300⟩

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