A compact approach to higher-resolution resonant inelastic X-ray scattering detection using photoelectrons
New Journal of Physics(2024)
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 Ba2Cu3O4Cl2 at the Cu L3-edge. We measure a
momentum transfer range of 24
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 become an alternative to 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.
MoreTranslated text
Key words
resonant inelastic x-ray scattering,high-temperature superconductor,quantum materials,photoemission,x-ray spectroscopy methods
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