Graphene Ribbon Growth on Structured Silicon Carbide. Issue 11 (9th August 2017)

• Record Type: Journal Article
• Authors: Stöhr, Alexander; Baringhaus, Jens; Aprojanz, Johannes; Link, Stefan; Tegenkamp, Christoph; Niu, Yuran; Zakharov, Alexei A.; Chen, Chaoyu; Avila, José; Asensio, Maria C.; Starke, Ulrich
• Other Names: Seyller Thomas guestEditor.
• Is Part Of: Annalen der Physik. Volume 529:Issue 11(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-08-09
• Subjects: Epitaxial graphene -- Nanoribbons -- Silicon carbide -- Side walls -- Facets -- LEEM -- ARPES -- AFM; Physics -- Periodicals; Chemistry -- Periodicals; 530.05
• DOI: 10.1002/andp.201700052
• Languages: English
• ISSNs: 0003-3804

Abstract

Abstract: Structured Silicon Carbide was proposed to be an ideal template for the production of arrays of edge specific graphene nanoribbons (GNRs), which could be used as a base material for graphene transistors. We prepared periodic arrays of nanoscaled stripe‐mesas on SiC surfaces using electron beam lithography and reactive ion etching. Subsequent epitaxial graphene growth by annealing is differentiated between the basal‐plane mesas and the faceting stripe walls as monitored by means of atomic force microscopy (AFM). Microscopic low energy electron diffraction (μ‐LEED) revealed that the graphene ribbons on the facetted mesa side walls grow in epitaxial relation to the basal‐plane graphene with an armchair orientation at the facet edges. The π‐band system of the ribbons exhibits linear bands with a Dirac like shape corresponding to monolayer graphene as identified by angle‐resolved photoemission spectroscopy (ARPES). Abstract : Epitaxial graphene nanoribbons are prepared on lithographically structured Silicon Carbide. The ribbons grow on the facetted mesa side walls in epitaxial relation to the basal‐plane graphene. In angle‐resolved photoemission spectroscopy (ARPES) the π‐ electrons from the ribbons display a sharp band and emerge at a distinctly different emission angle compared to the basal‐plane graphene.