Comparison of ion beam and electron beam induced transport of hot charge carriers in metal-insulator-metal junctions

In: Proceedings of the European Materials Research Society 2011. - MRS Spring Meeting - Symposium II – Ion Beams—New Applications from Mesoscale to Nanoscale : (MRS Proceedings ; 1354)
Buchaufsatz / Kapitel / Fach: Chemie
Fakultät für Physik
Fakultät für Chemie » Physikalische Chemie
The generation of hot charge carriers within a solid bombarded by charged particles is investigated using biased thin film metal-insulator-metal (MIM) devices. For slow, highly charged ions approaching a metal surface the main dissipation process is electronic excitation of the substrate, leading to electron emission into the vacuum and internal electron emission across the MIM junction. In order to gain a deeper understanding of the distribution and transport of the excited charge carriers leading to the measured device current, we compare ion induced and electron induced excitation processes in terms of absolute internal emission yields as well as their dependence on the applied bias voltage.