Freie Universität Berlin - Fachbereich Physik - Institut für Experimentalphysik
We are a research group in the Physics Department of Freie University specializing in nanoscale electronics and optoelectronics. Our main focus is two-dimensional atomic crystals – a class of materials that are only atoms thick. These include: graphene, atomically thick form of carbon with record electrical conductivity, thermal conductivity, and strength; monolayer transition metal dichalcogenides (MoS2, WSe2, MoSe2), semiconductors strongly interacting with light; and monolayer boron nitride (BN), an atomically-smooth insulator material. Our overarching goal is to answer the following questions: How does one controllably create, pattern, and manipulate two-dimensional atomic crystals? What happens to interacting electrons that are confined in two dimensions and are governed by the laws of quantum mechanics? Can we use nanoelectromechanical devices based on graphene to sense ultrasmall forces and weigh ultralight objects? Our main experimental tools include nanofabrication, transport measurements, static and time-resolved optoelectronic measurements.