Graphene nanoribbons on vicinal SiC surfaces by molecular beam epitaxy

Autor:	Kajiwara, Takashi, Nakamori, Yuzuru, Visikovskiy, Anton, Iimori, Takushi, Komori, Fumio, Nakatsuji, Kan, Mase, Kazuhiko, Tanaka, Satoru
Rok vydání:	2012
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.87.121407
Popis:	We present a new method of producing a densely ordered array of epitaxial graphene nanoribbons (GNRs) using vicinal SiC surfaces as a template, which consist of ordered pairs of (0001) terraces and nanofacets. Controlled selective growth of graphene on approximately 10 nm wide of (0001) terraces with 10 nm spatial intervals allows GNR formation. By selecting the vicinal direction of SiC substrate, [1-100], well-ordered GNRs with predominantly armchair edges are obtained. These structures, the high density GNRs, enable us to observe the electronic structure at K-points by angle-resolved photoemission spectroscopy, showing clear band-gap opening of at least 0.14 eV. Comment: 4 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.4304 Zobrazit plný text záznamu View this record from Arxiv