PhotoElectron Analysis and X-ray Inelastic Spectroscopy /U41

The instrument PEAXIS (PhotoElectron Analysis and X-ray Inelastic Spectroscopy) is located at the U41-PEAXIS beamline, which is one of the highest flux beamlines at BESSY II and provides highly focused soft X-rays, thanks to the ellipsoidal refocusing mirror. The instrument is dedicated to studies of angle-resolved RIXS (Resonant Inelastic X-ray Scattering) and PES (PhotoElectron Spectroscopy) on solids. As shown in the Schematic figure below, the station is equipped with an electron energy analyzer (violet) and a RIXS spectrometer (blue). Various sample manipulators (red) can be installed in the sample chamber (green). The RIXS arm is continuously rotatable on a supporting rail in a range of 106 degrees.

Selected Applications:

• Magnetic, d-d and charge transfer excitations in model quantum materials and functional energy materials
• Dispersive excitations in quantum materials (e.g. plasmons and excitons)
• Electron-phonon coupling in solid-state materials
• Reaction mechanisms in battery materials

Schematic of the PEAXIS station

Methods

ARPES, XPS, REXS, RIXS, EXAFS, NEXAFS

Remote access

depends on experiment - please discuss with Instrument Scientist

Photo of the PEAXIS station

RIXS spectra of liquid acetone vibrations detected at the excitation energy of 531 eV and various θ angles. The intense peaks at the channel 1000 come from the elastic scattering, and the rest, equally-spaced peaks represent the vibrational excited final states in the electronic ground state. The RIXS resolution (combined with the beamline) at 531 eV is about 60 meV.

Coverage of PEAXIS plotted as a function of the incoming photon energy. Dashed lines indicate the position of the K-edge (blue) or an L-edge (red) of commonly measured elements.