Edge-dependent transport properties in graphene

Hidenori Goto; Eri Uesugi; Ritsuko Eguchi; Akihiko Fujiwara; Yoshihiro Kubozono

doi:10.1021/nl3044844

Edge-dependent transport properties in graphene

Hidenori Goto, Eri Uesugi, Ritsuko Eguchi, Akihiko Fujiwara, Yoshihiro Kubozono

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1126-1130
Number of pages	5
Journal	Nano Letters
Volume	13
Issue number	3
DOIs	https://doi.org/10.1021/nl3044844
Publication status	Published - Mar 13 2013

Keywords

Graphene
Raman spectroscopy
edge
flat band
ionic liquid gate
transport property

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl3044844

Cite this

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AU - Goto, Hidenori

AU - Uesugi, Eri

AU - Eguchi, Ritsuko

AU - Fujiwara, Akihiko

AU - Kubozono, Yoshihiro

PY - 2013/3/13

Y1 - 2013/3/13

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AB - 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.

KW - Graphene

KW - Raman spectroscopy

KW - edge

KW - flat band

KW - ionic liquid gate

KW - transport property

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Edge-dependent transport properties in graphene

Abstract

Keywords

ASJC Scopus subject areas

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