SEPARATION OF INITIAL AND FINAL STATE CONTRIBUTIONS TO CHEMICAL SHIFTS IN TERMS OF A POTENTIAL MODEL

1994 ◽  
Vol 01 (04) ◽  
pp. 469-472 ◽  
Author(s):  
R.J. COLE ◽  
P. WEIGHTMAN
Keyword(s):  
Charge Transfer ◽  
Ground State ◽  
Potential Model ◽  
Chemical Shifts ◽  
Free Atom ◽  
Core Hole ◽  
Final State ◽  
State Charge ◽  
Elemental Solid

A recently developed potential model facilitates the separation of initial and final state contributions to chemical shifts in terms of ground state charge transfer and differences in core hole screening charge. The model is applied to the free atom to elemental solid shifts of the elements Na, Mg, Si, and Zn.

Ground-state charge-transfer complex formation in hybrid poly(3-hexyl thiophene):titanium dioxide solar cells

2008 ◽  
Vol 93 (22) ◽  
pp. 223302 ◽  
Author(s):  
I. Haeldermans ◽  
K. Vandewal ◽  
W. D. Oosterbaan ◽  
A. Gadisa ◽  
J. D’Haen ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Charge Transfer ◽  
Complex Formation ◽  
Ground State ◽  
Charge Transfer Complex ◽  
State Charge

CORE-HOLE EFFECT IN THE Ce L3 X-RAY ABSORPTION SPECTRA OF CeO2 AND CeFe2: NEW EXAMINATION BY USING RESONANT X-RAY EMISSION SPECTROSCOPY

2013 ◽  
Vol 27 (16) ◽  
pp. 1330012 ◽  
Author(s):  
A. KOTANI
Keyword(s):  
Absorption Spectra ◽  
Ground State ◽  
Theoretical Calculations ◽  
Emission Spectra ◽  
Core Hole ◽  
Final State ◽  
X Ray ◽  
The Core ◽  
X Ray Absorption ◽  
Hole Effect

We consider two different resonant X-ray emission spectra for Ce compounds: Ce 3d to 2p X-ray emission (denoted by 3d-RXES) and valence to 2p X-ray emission (v-RXES), both of which follow the Ce 2p to 5d resonant excitation. We propose that the comparison of the 3d- and v-RXES spectra is a new powerful method of directly detecting the core-hole effect in the final state of Ce L 3 X-ray absorption spectra (XAS). We applied this method to recent experimental RXES spectra for CeO 2 and CeFe 2, and showed unambiguously that the core-hole effect should be essential in the XAS of both materials. This result is confirmed by theoretical calculations, which reproduce well the experimental RXES and XAS spectra. We conclude that the ground state of CeO 2 is in the mixed state of 4f0 and [Formula: see text] configurations, where [Formula: see text] is a ligand hole, instead of a pure 4f0 configuration which was proposed recently by first-principles energy band calculations. Also, we conclude that the double peaks observed in L 3 XAS of CeFe 2 are caused by the 4f0 and 4f1 configurations, which are mixed in the ground state but separated in energy by the large core-hole potential in the final state of XAS.

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