Electrical contact resistance in graphite–graphene contacts from ab initio methods. (17th July 2018)

• Record Type: Journal Article
• Authors: Jovell, Ferran; Cartoixà, Xavier
• Is Part Of: Journal of physics. Volume 30:Number 32(2018)
• Publication Date: 2018-07-17
• Subjects: DFT -- graphene -- graphite -- contact resistance -- ballistic injection; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aacd83
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We study the ballistic transmission and the contact resistance ( R c ) of a graphite–graphene contact in a top contact geometry from first principles. We find that the calculated R c '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 c can be lower than the 100 mark. On the other hand, edge graphite–graphene contacts are expected to have very low contact resistance.