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 | |
| 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