Jovell Ferran, Cartoixà Xavier
Departament d'Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
J Phys Condens Matter. 2018 Aug 15;30(32):325302. doi: 10.1088/1361-648X/aacd83. Epub 2018 Jul 17.
We study the ballistic transmission and the contact resistance (R ) of a graphite-graphene contact in a top contact geometry from first principles. We find that the calculated R '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 R can be lower than the 100 [Formula: see text] mark. On the other hand, edge graphite-graphene contacts are expected to have very low contact resistance.
我们从第一性原理出发，研究了顶接触几何结构中石墨 - 石墨烯接触的弹道输运和接触电阻（R）。我们发现，计算得到的R值取决于石墨烯与石墨的重叠量，但对于几十埃量级的转移长度，其值会迅速饱和。对于重叠超过该转移长度的接触，R值可能低于100[公式：见正文]标记。另一方面，边缘石墨 - 石墨烯接触预计具有非常低的接触电阻。
