Crystallographic refinement of collective excitations using standing wave inelastic X-ray scattering

Yu Gan, Anshul Kogar, Peter Abbamonte

Research output: Contribution to journalArticlepeer-review


We propose a method for realizing true, real-space imaging of charge dynamics in a periodic system, with angstrom spatial resolution and attosecond time resolution. In this method, inelastic X-ray scattering (IXS) is carried out with a coherent, standing wave source, which provides the off-diagonal elements of the generalized dynamic structure factor, S(q1, q2,ω), allowing complete reconstruction of the inhomogeneous response function of the system, χ(x1,x2,t). The quantity χ has the physical meaning of a propagator for charge, so allows one to observe-in real time-the disturbance in the electron density created by a point source placed at a specified location, x1 (on an atom vs. between atoms, for example). This method may be thought of as a generalization of X-ray crystallography that allows refinement of the excited states of a periodic system, rather than just its ground state.

Original languageEnglish (US)
Pages (from-to)160-167
Number of pages8
JournalChemical Physics
StatePublished - Mar 12 2013


  • Attosecond
  • Imaging
  • Inelastic X-ray scattering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)


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