TITLE

Electronic property of Na-doped epitaxial graphenes on SiC

AUTHOR(S)
Seon-Myeong Choi; Seung-Hoon Jhi
PUB. DATE
April 2009
SOURCE
Applied Physics Letters;4/13/2009, Vol. 94 Issue 15, p153108
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electronic property of epitaxial graphenes with Na adsorption or intercalation is studied with the use of pseudopotential density functional method. It is found that the charge transfer and the Na binding energy show strong coverage dependence. Calculated energetics shows that Na prefers the intercalation between the buffer and top graphene layers to the adsorption on top graphene layer. The buffer layer is inert to Na adsorption on top graphene layer but it is charged when Na atoms are intercalated. This indicates that the conduction of epitaxial graphenes can be affected significantly by Na intercalation.
ACCESSION #
37831811

 

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