The role of contaminations on the interaction of highly charged ions with 2D materials

Abstract

Contaminations on two dimensional materials can inuence electronic, optical or mechanical material properties or even dominate them. We perform ion beam spectroscopy with highly charged ions as projectiles transmitted through freestanding 2D materials to study fundamental charge exchange processes between the ion and the samples under extreme conditions. Various in situ cleaning techniques to remove contaminations such as laser annealing and sample heating are employed. Their inuence on our spectroscopy results is discussed here.