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Electronic properties of zigzag graphene nanoribbons on Si(001).
- Source :
-
Applied Physics Letters . 7/13/2009, Vol. 95 Issue 2, p023107. 3p. 3 Graphs. - Publication Year :
- 2009
-
Abstract
- We show by first-principles calculations that the electronic properties of zigzag graphene nanoribbons (Z-GNRs) adsorbed on Si(001) substrate strongly depend on ribbon width and adsorption orientation. Only narrow Z-GNRs with even rows of zigzag chains across their width adsorbed perpendicularly to the Si dimer rows possess an energy gap, while wider Z-GNRs are metallic due to width-dependent interface hybridization. The Z-GNRs can be metastably adsorbed parallel to the Si dimer rows, but show uniform metallic nature independent of ribbon width due to adsorption-induced dangling-bond states on the Si surface. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ADSORPTION (Chemistry)
*SEPARATION (Technology)
*SURFACE chemistry
*CHEMISORPTION
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 95
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 43277382
- Full Text :
- https://doi.org/10.1063/1.3179426