Graphene - the strictly two-dimensional, honeycomb lattice of carbon atoms - is a two-dimensional electron gas system (2DEG) with unique properties. With its charge carriers being described as massless, chiral Dirac Fermions, graphene has stimulated fundamental interest. Quantum electrodynamics (QED) phenomena such as Klein tunnelling and Veselago lensing have been predicted and observed for graphene pn-junctions. The robust half-integer quantum Hall effect could be exploited ebq jraxorxq Qqlrcir bwslybchi pkrtvlw.
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