Abstract
We study the ballistic transmission and the contact resistance (Rc) of a graphite–graphene contact in a top contact geometry from first principles. We find that the calculated Rc’s depend on the amount of graphene–graphite overlap, but quickly saturate for transfer lengths of the order of a few tens of Å. For contacts overlapping more than this transfer length, the Rc can be lower than the 100 mark. On the other hand, edge graphite–graphene contacts are expected to have very low contact resistance.
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