Schüler M., and Berakdar J.

Recent experimental progress in creating and controlling singular electron beams that carry orbital angular momentum allows for new types of local spectroscopies. We investigate theoretically the twisted-electron-energy-loss spectroscopy (EELS) from the C60 fullerene. Of particular interest are the strong multipolar collective excitations and their selective response to the orbital angular momentum of the impinging electron beam. Based on ab initio calculations for the collective response, we compute EELS signals with twisted-electron beams, particularly in a transmission electron microscopy setup, and uncover the interplay between the plasmon polarity and the amount of angular momentum transfer.

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