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  4. A setup for hard x-ray time-resolved resonant inelastic x-ray scattering at SwissFEL
 
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research article

A setup for hard x-ray time-resolved resonant inelastic x-ray scattering at SwissFEL

Chen, Hui-Yuan  
•
Versteeg, Rolf Baldwin  
•
Mankowsky, Roman
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March 1, 2024
Structural Dynamics-Us

We present a new setup for resonant inelastic hard x-ray scattering at the Bernina beamline of SwissFEL with energy, momentum, and temporal resolution. The compact R = 0.5 m Johann-type spectrometer can be equipped with up to three crystal analyzers and allows efficient collection of RIXS spectra. Optical pumping for time-resolved studies can be realized with a broad span of optical wavelengths. We demonstrate the performance of the setup at an overall similar to 180 meV resolution in a study of ground-state and photoexcited (at 400 nm) honeycomb 5d iridate alpha-Li2IrO3. Steady-state RIXS spectra at the iridium L-3-edge (11.214 keV) have been collected and are in very good agreement with data collected at synchrotrons. The time-resolved RIXS transients exhibit changes in the energy loss region <2 eV, whose features mostly result from the hopping nature of 5d electrons in the honeycomb lattice. These changes are ascribed to modulations of the Ir-to-Ir inter-site transition scattering efficiency, which we associate to a transient screening of the on-site Coulomb interaction. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)

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Type
research article
DOI
10.1063/4.0000236
Web of Science ID

WOS:001197533500001

Author(s)
Chen, Hui-Yuan  
•
Versteeg, Rolf Baldwin  
•
Mankowsky, Roman
•
Puppin, Michele  
•
Diniz Leroy, Ludmila Maria  
•
Sander, Mathias
•
Deng, Yunpei
•
Oggenfuss, Roland Alexander
•
Zamofing, Thierry
•
Boehler, Pirmin
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Date Issued

2024-03-01

Publisher

Aip Publishing

Published in
Structural Dynamics-Us
Volume

11

Issue

2

Article Number

024308

Subjects

Physical Sciences

•

Dynamics

•

Excitations

•

Electron

•

Physics

•

Energy

•

States

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LUMES  
LSU  
FunderGrant Number

ERC Advanced Grant DYNAMOX

695197

Taiwan-EPFL Ph.D. Scholarship

ERC Advanced Grant CHIRAX

101095012

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Available on Infoscience
April 17, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/207372
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