title: Unraveling the nature of charge excitations in La₂CuO₄ with momentum-resolved Cu K-edge resonant inelastic x-ray scattering.
abstract: The results of model calculations using exact diagonalization reveal the orbital character of states associated with different Raman loss peaks in Cu K-edge resonant inelastic x-ray scattering (RIXS) from La₂CuO₄. The model includes electronic orbitals necessary to highlight the nonlocal Zhang-Rice singlet, charge transfer, and d-d excitations, as well as states with apical oxygen 2p(z) character. The dispersion of these excitations is discussed with prospects for resonant final state wave-function mapping. A good agreement with experiments emphasizes the substantial multiorbital character of RIXS profiles in the energy transfer range 1-6 eV.
authors.affiliation: Stanford Institute for Materials and Energy Science, Menlo Park, California 94025, USA.
authors.forename: C-C
authors.initials: CC
authors.lastname: Chen
authors.forename: B
authors.initials: B
authors.lastname: Moritz
authors.forename: F
authors.initials: F
authors.lastname: Vernay
authors.forename: J N
authors.initials: JN
authors.lastname: Hancock
authors.forename: S
authors.initials: S
authors.lastname: Johnston
authors.forename: C J
authors.initials: CJ
authors.lastname: Jia
authors.forename: G
authors.initials: G
authors.lastname: Chabot-Couture
authors.forename: M
authors.initials: M
authors.lastname: Greven
authors.forename: I
authors.initials: I
authors.lastname: Elfimov
authors.forename: G A
authors.initials: GA
authors.lastname: Sawatzky
authors.forename: T P
authors.initials: TP
authors.lastname: Devereaux