scholarly journals Spectral weight of resonant inelastic X-ray scattering in doped cuprates: Effect of core-hole lifetime

2018 ◽  
Vol 32 (17) ◽  
pp. 1840017 ◽  
Author(s):  
Takami Tohyama ◽  
Kenji Tsutsui
Keyword(s):  
Spectral Weight ◽  
Main Peak ◽  
Core Hole ◽  
X Ray ◽  
The Core ◽  
X Ray Scattering ◽  
Spin Flip ◽  
X Ray Absorption ◽  
Magnon Excitation ◽  
Ray Scattering

We examine the effect of core-hole lifetime on the spectral weight of resonant inelastic X-ray scattering (RIXS) in hole-doped cuprates. We calculate the spectral weight by using the exact diagonalization technique for a 4 × 4 doped Hubbard lattice and find that the spin-flip channel detecting single-magnon excitation is less sensitive to the core-hole lifetime while in the non-spin-flip channel the spectral weight is strongly dependent on the lifetime. In the latter, charge and two-magnon excitations predominately contribute to RIXS for short and long core-hole lifetimes, respectively. For a realistic value of the core-hole lifetime in cuprates, both the charge and two-magnon excitations are expected to contribute to the non-spin-flip channel in RIXS when the incident-photon energy is tuned to the main peak of X-ray absorption spectrum.

scholarly journals Vibrational resonant inelastic X-ray scattering in liquid acetic acid: a ruler for molecular chain lengths

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Viktoriia Savchenko ◽  
Iulia Emilia Brumboiu ◽  
Victor Kimberg ◽  
Michael Odelius ◽  
Pavel Krasnov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Acetic Acid ◽  
Molecular Chain ◽  
X Ray ◽  
X Ray Scattering ◽  
Localized Excitations ◽  
Vibrational Excitations ◽  
Chain Lengths ◽  
X Ray Absorption ◽  
Ray Scattering

AbstractQuenching of vibrational excitations in resonant inelastic X-ray scattering (RIXS) spectra of liquid acetic acid is observed. At the oxygen core resonance associated with localized excitations at the O–H bond, the spectra lack the typical progression of vibrational excitations observed in RIXS spectra of comparable systems. We interpret this phenomenon as due to strong rehybridization of the unoccupied molecular orbitals as a result of hydrogen bonding, which however cannot be observed in x-ray absorption but only by means of RIXS. This allows us to address the molecular structure of the liquid, and to determine a lower limit for the average molecular chain length.

scholarly journals Crystalline and magnetic structure of Ba2CuO3+δ investigated by x-ray absorption spectroscopy and resonant inelastic x-ray scattering

2020 ◽  
pp. 1353810
Author(s):  
Roberto Fumagalli ◽  
Abhishek Nag ◽  
Stefano Agrestini ◽  
Mirian Garcia-Fernandez ◽  
Andrew C. Walters ◽  
...  
Keyword(s):  
Magnetic Structure ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Absorption ◽  
Ray Scattering

Note: Construction of x-ray scattering and x-ray absorption fine structure beamline at the Pohang Light Source

2010 ◽  
Vol 81 (2) ◽  
pp. 026103 ◽  
Author(s):  
Ik-Jae Lee ◽  
Chung-Jong Yu ◽  
Young-Duck Yun ◽  
Chae-Soon Lee ◽  
In Deuk Seo ◽  
...  
Keyword(s):  
Fine Structure ◽  
Light Source ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Scattering ◽  
Pohang Light Source ◽  
X Ray Absorption ◽  
Ray Scattering

scholarly journals 1s2p resonant inelastic X-ray scattering combined dipole and quadrupole analysis method

2017 ◽  
Vol 24 (1) ◽  
pp. 296-301 ◽  
Author(s):  
Alexander Bagger ◽  
Ties Haarman ◽  
Anna Puig Molina ◽  
Poul George Moses ◽  
Hirofumi Ishii ◽  
...  
Keyword(s):  
Continuum Model ◽  
Analysis Method ◽  
Exciton Model ◽  
X Ray ◽  
Additional Information ◽  
X Ray Scattering ◽  
Analysis Strategy ◽  
X Ray Absorption ◽  
The Continuum ◽  
Ray Scattering

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 1s2p RIXS planes of VO2 and TiO2, 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.

scholarly journals Structural Transitions in MgSiO 3 Glasses and Melts at the Core‐Mantle Boundary Observed via Inelastic X‐ray Scattering

2019 ◽  
Vol 46 (23) ◽  
pp. 13756-13764 ◽  
Author(s):  
Yong‐Hyun Kim ◽  
Yoo Soo Yi ◽  
Hyo‐Im Kim ◽  
Paul Chow ◽  
Yuming Xiao ◽  
...  
Keyword(s):  
Structural Transitions ◽  
X Ray ◽  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
The Core ◽  
X Ray Scattering ◽  
Ray Scattering

Band-structure and core-hole effects in resonant inelastic soft-x-ray scattering: Experiment and theory

1999 ◽  
Vol 59 (11) ◽  
pp. 7433-7445 ◽  
Author(s):  
J. A. Carlisle ◽  
Eric L. Shirley ◽  
L. J. Terminello ◽  
J. J. Jia ◽  
T. A. Callcott ◽  
...  
Keyword(s):  
Band Structure ◽  
Core Hole ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Experiment ◽  
Ray Scattering

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.

Confocal X-ray technology based on capillary X-ray optics

2015 ◽  
Vol 34 (1-2) ◽  
Author(s):  
Tianxi Sun ◽  
Xunliang Ding
Keyword(s):  
Life Science ◽  
Food Science ◽  
X Ray Diffraction ◽  
Ray Optics ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Imaging ◽  
X Ray Absorption ◽  
Security Check ◽  
Ray Scattering

AbstractCapillary X-ray optics is versatile, and it can be used with synchrotron radiation source, conventional X-ray source, laser-plasma ultrafast X-ray source, and so forth. Recently, the confocal X-ray technology based on capillary X-ray optics has become popular, and it has been widely used in X-ray fluorescence, X-ray absorption fine structure, X-ray diffraction, small-angle X-ray scattering, X-ray imaging, and X-ray scattering. This confocal X-ray technology has applications in many fields, including environmental monitoring, food science, life science, chemistry, physics, nanomaterials, nondestructive test, security check, and so on.

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