Effective transition operators for resonant inelastic X-ray scattering

Details Effective transition operators for resonant inelastic X-ray scattering Effective transition operators for resonant inelastic X-ray scattering

2011-06-03

arxiv.org/abs/1106.0640v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages

Scientific paper

Effective symmetry-based transition operators for resonant inelastic X-ray scattering (RIXS) are derived that show how the scattering between different states depends on the polarization of the incoming and outgoing X-rays. In spherical symmetry, the effective operators can be rewritten in terms of spin operators, although the expressions depend on the nature of the ground state. For lower symmetries, the combined action of the crystal field and the spin-orbit interaction breaks up the spin space and spin operators are no longer appropiate operators. By taking iridium compounds as an example, it is demonstrated that effective scattering operators can still be obtained. These effective transition operators facilitate our understanding how RIXS couples to elementary excitations.

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