Resonant Inelastic X-Ray Scattering

What quantities are transferred to an electronic system in the RIXS scattering processes?

• Atoms

• Momentum

• Charge

• Energy

What type of excitation has a constant energy transfer relative to the elastic peak in a RIXS spectrum?

• Raman excitation

• Fluorescence excitation

• Elastic excitation

• None of the above

What is the advantage of using the intensity ratio of the first two harmonics of a phonon for extracting electron-phonon coupling from experimental RIXS data?

• Impossible if two harmonics cannot be resolved

• Requires measuring absolute cross-section

• Works also when two harmonics cannot be separated

• No absolute intensity measurement is needed

What does in the Holstein Hamiltonian couple to a single electronic level ?

• The spin of the transition metal site

• One, two or several Einstein phonon modes

• The charge transfer excitation at zero energy

• All the other electronic levels

What interaction enables strong spin flips in L-edge RIXS of transition metals?

• Electron-phonon coupling

• Spin-orbit coupling of the core electrons

• The Coulomb interaction between the core-hole and the valence electrons

• The crystal field interaction

What parameters influence the decay of the intensities of the phonon harmonics / how many phonon harmonics will be present in a RIXS spectrum?

• The inverse core hole lifetime

• The phonon line width

• The electron phonon coupling constant

• The total spin of the electronic configuration

• The crystal field

RIXS is ....

• element selective

• chemical site specific

• orbital specific

• limited in its broadening by the core hole lifetime in the intermediate state

Why does one need to consider second order perturbation theory for deriving the Kramers-Heisenberg cross section formula for RIXS?

• RIXS is an X-ray spectroscopy and all X-ray spectrocopies are very hard

• RIXS involves always the Frank-Condon effect

• RIXS is a combination of two electronic transitions due to the X-ray absorption and X-ray emission processes

• RIXS is the inverse of photoelectron spectroscopy