Measurements and analysis of electronic transport in etched graphene nanoconstrictions

This master thesis report describes theoretical notions on graphene, quantum point contacts and quantum Hall effect to grasp the main ideas useful for the analysis of collected data. Then, a description of the experimental part is given to understand how the data was acquired and in which conditions. Finally, the last part relates to the studies of varied electronic properties in two different samples featuring etched graphene nanoconstrictions using the data. Especially, the properties inherent from the presence of the nanoconstrictions are much better described in one sample compared to the other and thus shows its better quality. A part about simulations using Kwant software has also been carried out to try to reproduce an experimental result based on a simple model formulated as an hypothesis.