Open Access1 s 2 p resonant inelastic X‐ray scattering combined dipole and quadrupole analysis method
Author(s) -
Bagger Alexander,
Haarman Ties,
Puig Molina Anna,
Moses Poul George,
Ishii Hirofumi,
Hiraoka Nozomu,
Wu Yu-Han,
Tsuei Ku-Ding,
Chorkendorff Ib,
De Groot Frank
Publication year - 2017
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577516016933
Subject(s) - resonant inelastic x ray scattering , x ray absorption spectroscopy , exciton , quadrupole , physics , scattering , dipole , atomic physics , spectroscopy , inelastic scattering , absorption spectroscopy , optics , condensed matter physics , x ray raman scattering , quantum mechanics
In this study an analysis strategy towards using the resonant inelastic X‐ray scattering (RIXS) technique more effectively compared with X‐ray absorption spectroscopy (XAS) is presented. In particular, the question of when RIXS brings extra information compared with XAS is addressed. To answer this question the RIXS plane is analysed using two models: (i) an exciton model and (ii) a continuum model. The continuum model describes the dipole pre‐edge excitations while the exciton model describes the quadrupole excitations. Applying our approach to the experimental 1 s 2 p RIXS planes of VO 2 and TiO 2 , it is shown that only in the case of quadrupole excitations being present is additional information gained by RIXS compared with XAS. Combining this knowledge with methods to calculate the dipole contribution in XAS measurements gives scientists the opportunity to plan more effective experiments.