RIXS - resonant inelastic x-ray scattering
XAS - x-ray absorption spectroscopy
XPS - x-ray photoelectron spectroscopy
ARPES - angle resolved photoemission spectroscopy
Spin flip excitations without spin-orbit coupling in the core-hole state
Fig. Momentum dependence of the RIXS spectra with p incident polarization.
Related publication: X. Liu, M.P.M. Dean, J Liu, S.G. Chiuzbăian, N. Jaouen, A. Nicolaou, W.G. Yin, C. Rayan Serrao, R. Ramesh, H. Ding, and J.P. Hill, Probing single magnon excitations in Sr2IrO4 using O K-edge resonant inelastic x-ray scattering, Journal of Physics: Condensed Matter 27, 202202 (2015) (view online)
Joint resonant inelastic x-ray scattering studies of 3d transition metal compounds: the CoO case
We performed resonant inelastic x-ray scattering (RIXS) measurements jointly across the M2,3 and L3 absorption thresholds in order to study CoO local electronic structure. Our high-resolution experimental data are supported by state-of-the-art model calculations: the same core-hole independent set of parameters is used within the single impurity Anderson model is used to describe both the M (3p-3d) and L (2p-3d). Measured M2,3-RIXS spectra are observed to be free of charge-transfer or normal fluorescence contributions. Moreover the cross section of M-RIXS final states with change in spin multiplicity is low. Combining this information with L-edge studies establishes an appealing means of making a better separation between on-site and intersite ligand to metal electronic excitations. Experimental and theoretical features specific to RIXS studies performed at M and L edges are summarized as a basis for future studies on complex transition metal compounds.
Fig. CoO RIXS measurements displayed after substraction of the elastic peak.
Related publication: S.G. Chiuzbăian, T. Schmitt, M. Matsubara, A. Kotani, G. Ghiringhelli, C. Dallera, A. Tagliaferri, L. Braicovich, V. Scagnoli, N. B. Brookes, U. Staub and L. Patthey, Combining M- and L-edge resonant inelastic x-ray scattering for studies of 3d transition metal compounds, Physical Review B 78, 245102 (2008)
First evidence of spin flip excitations with resonant inelastic x-ray scattering
We studied the neutral electronic excitations of NiO localized at the Ni sites by measuring the resonant inelastic x-ray scattering (RIXS) spectra at the Ni M2,3 edges. The good energy resolution allows an unambiguous identification of several spectral features due to dd excitations. The dependence of the RIXS spectra on the excitation energy gives evidence of local spin flip and yields a value of 125±15 meV for the antiferromagnetic exchange interaction. Accurate crystal field parameters are also obtained.
Fig. X-ray scattering results for NiO with incoming photon energies encompassing Ni M absorption edges. The spectra deliver information on the crystal-field and the magnetic exchange energy between Ni ions.
Related publication: S.G. Chiuzbăian, G. Ghiringhelli, C. Dallera, M. Grioni, P. Amann, X. Wang, L. Braicovich and L. Patthey, Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni M Threshold: Evidence of Spin Flip, Physical Review Letters 95, 197402 (2005) (view online)