title: Edge-dependent transport properties in graphene.
abstract: Graphene has two kinds of edges which have different electronic properties. A singular electronic state emerges at zigzag edges, while it disappears at armchair edges. We study the edge-dependent transport properties in few-layer graphene by applying a side gate voltage to the edge with an ionic liquid. The devices indicating a conductance peak at the charge neutrality point have zigzag edges, confirmed by micro-Raman spectroscopy mapping. The hopping transport between zigzag edges increases the conductance.
authors: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan. p57f8bcq@cc.okayama-u.ac.jp
authors: Hidenori
authors: H
authors: Goto
authors: Eri
authors: E
authors: Uesugi
authors: Ritsuko
authors: R
authors: Eguchi
authors: Akihiko
authors: A
authors: Fujiwara
authors: Yoshihiro
authors: Y
authors: Kubozono