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Updated: May 8, 2025

$Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene$

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Published on: August 22, 2017

Extending Resonant Inelastic X-ray Scattering to Extreme Ultraviolet.

Samuel Menzi¹, Fabio La Mattina², Francesco Barbato³

¹Laboratory for Synchrotron Radiation and Femtochemistry, Center for Photon Science, Paul Scherrer Institut (PSI), CH-5232 Villigen, Switzerland. samuel_menzi@hotmail.com.

|March 3, 2025

Summary

This summary is machine-generated.

We studied alpha-aluminum oxide (α-Al2O3) using X-ray absorption (XAS) and emission (XES/RIXS) spectroscopy. Our findings reveal distinct electronic transitions and a surprisingly sharp RIXS signal, offering insights into material properties.

Keywords:

EUV spectroscopy Synchrotron experiments

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Area of Science:

Materials Science
Solid-State Physics
Atomic and Molecular Physics

Background:

Alpha-aluminum oxide (α-Al2O3) is a widely used ceramic material.
Understanding its electronic structure is crucial for optimizing its properties.
X-ray spectroscopy provides detailed insights into electronic transitions.

Purpose of the Study:

To investigate the electronic structure of α-Al2O3.
To characterize electronic transitions at the Al L2/L3 edges.
To analyze the differences between fluorescence and RIXS signals.

Main Methods:

High-resolution X-ray Absorption Spectroscopy (XAS).
High-resolution X-ray Emission Spectroscopy (XES).
Resonant Inelastic X-ray Scattering (RIXS) measurements at the Al L2/L3 edges.

Main Results:

Identified two fluorescence peaks corresponding to electronic transitions involving Al 3s, Al 3d, and O 2p orbitals.
Observed a single, clear RIXS signal with an energy loss of 10.7 eV, despite multiple XAS resonances.
Extracted linewidths for fluorescence and RIXS transitions, with RIXS linewidths being approximately half those of fluorescence.

Conclusions:

The study provides detailed electronic structure information for α-Al2O3.
The distinct RIXS signal offers a sensitive probe of electronic states.
The narrower RIXS linewidth suggests a more localized electronic excitation compared to fluorescence.