Demonstration of angular-momentum-resolved electron energy-loss spectroscopy.
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- Record sourced from PubMed, PMID 40675985.
- Also identified by DOI 10.1038/s41467-025-60804-3 and PMC identifier 12271546.
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Abstract
Rotational invariance is a fundamental aspect of symmetry in scattering processes from atomic potentials. Here, we present an approach for measuring orbital angular momentum (OAM), a key descriptor of rotational symmetry, during measurements of atomic transitions. We use an electron optical OAM sorter in combination with electron energy-loss spectroscopy and model-based fitting to separately measure the π* and σ* antibonding transitions in hexagonal boron nitride on the atomic scale. This approach also offers prospects for efficient and atomically-resolved magnetic chiral dichroism measurements.