title: Two-dimensional x-ray correlation spectroscopy of remote core states.
abstract: Nonlinear all-X-ray signals that involve large core-atom separation compared to the X-ray wavelengths may not be described by the dipole approximation since they contain additional phase factors. Expressions for the rotationally averaged 2D X-ray photon echo signals from randomly oriented systems that take this position-dependent phase into account for arbitrary ratio between the core separation and the resonant wavelength are presented. Application is made to the Se K-edge of a selenium dipeptide system.
authors.affiliation: Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697-2025, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Healion
authors.affiliation: Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697-2025, USA.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697-2025, USA.
authors.forename: Jason D
authors.initials: JD
authors.lastname: Biggs
authors.affiliation: Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697-2025, USA.
authors.forename: Weijie
authors.initials: W
authors.lastname: Hua
authors.affiliation: Department of Chemistry, University of California , 450 Rowland Hall, Irvine, California 92697-2025, USA.
authors.forename: Shaul
authors.initials: S
authors.lastname: Mukamel