Demonstration of angular-momentum-resolved electron energy-loss spectroscopy
- A. H. Tavabi
- P. Rosi
- G. Bertoni
- E. Rotunno
- L. Belsito
- A. Roncaglia
- S. Frabboni
- G. C. Gazzadi
- E. Karimi
- P. Tiemeijer
- R. E. Dunin-Borkowski
- V. Grillo
2025-07-17
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.