Journal Article

PUBDB-2024-00199

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A compact approach to higher-resolution resonant inelastic x-ray scattering detection using photoelectrons

Schunck, J.DESY* ; Buck, J.Extern*XFEL.EU* ; Engel, R.XFEL.EU*DESY* ; Kruse, S.Extern* ; Marotzke, S.Extern*XFEL.EU*DESY* ; Scholz, M.XFEL.EU*DESY* ; Mahatha, S. K.Extern* ; Huang, M.-J.DESY* ; Ronnow, H.Extern* ; Dakovski, G.Extern* ; Hoesch, M.DESY* ; Kallaene, M.Extern* ; Rossnagel, K.DESY* ; Beye, M. (Corresponding author)XFEL.EU*DESY*

2024
IOP [London]

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Please use a persistent id in citations: doi:10.1088/1367-2630/ad4206  doi:10.3204/PUBDB-2024-00199

Abstract: The detection of inelastically scattered soft x-rays with high energy resolution usually requires large grating spectrometers. Recently, photoelectron spectrometry for analysis of x-rays (PAX) has been rediscovered for modern spectroscopy experiments at synchrotron light sources. By converting scattered photons to electrons and using an electron energy analyser, the energy resolution for resonant inelastic x-ray scattering (RIXS) becomes decoupled from the x-ray spot size and instrument length. In this work, we develop PAX towards high energy resolution using a modern photoemission spectroscopy setup studying Ba$_2$Cu$_3$O$_4$Cl$_2$ at the Cu L$_3$-edge. We measure a momentum transfer range of 24% of the first Brillouin zone simultaneously. Our results hint at the observation of a magnon excitation below 100 meV energy transfer and show intensity variations related to the dispersion of dd-excitations. With dedicated setups, PAX can complement the best and largest RIXS instruments, while at the same time opening new opportunities to acquire RIXS at a range of momentum transfers simultaneously and combine it with angle-resolved photoemission spectroscopy in a single instrument.

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Contributing Institute(s):

1. FS-FLASH (FS-FLASH)
2. Experimentebetreuung PETRA III (FS-PET-S)
3. FS-SXQM (FS-SXQM)
4. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. VH-NG-1105 - Novel soft X-ray spectroscopies for materials science (2016_IVF-VH-NG-1105) (2016_IVF-VH-NG-1105)
4. FS-Proposal: I-20191064 (I-20191064) (I-20191064)

Experiment(s):

1. PETRA Beamline P04 (PETRA III)

Appears in the scientific report 2024

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