Cornejo, J.M.; Brombacher, J.; Coenders, J.A.; Boehn, M. von; Meiners, T. et al.: Optical stimulated-Raman sideband spectroscopy of a single 9Be+ ion in a Penning trap. In: Physical review research 5 (2023), 033226. DOI:
https://doi.org/10.1103/PhysRevResearch.5.033226