Die elektrisch geladene Spitze eines Rastertunnelmikroskops (oben) und ein zusätzliches Magnetfeld führen zu stabilen, lokalisierten Elektronenzuständen im Graphen.
Electrons reveal their quantum properties when they are confined to small spaces. Scientists from TU Wien (Vienna), Aachen and Manchester have created tiny quantum dots in Graphene. The charged tip of a scanning tunneling microscope and an additional magnetic field lead to localized stable electron states in graphene. In a tiny quantum prison, electrons behave quite differently as compared to their counterparts in free space. They can only occupy discrete energy levels, much like the electrons in an atom - for this reason, such electron prisons are often called "artificial atoms". Artificial atoms may also feature properties beyond those of conventional ones, with the potential for many applications for example in quantum computing. Such additional properties have now been shown for artificial atoms in the carbon material graphene.
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