Loading…

Dynamic Tunneling Junctions at the Atomic Intersection of Two Twisted Graphene Edges

The investigation of the transport properties of single molecules by flowing tunneling currents across extremely narrow gaps is relevant for challenges as diverse as the development of molecular electronics and sequencing of DNA. The achievement of well-defined electrode architectures remains a tech...

Full description

Saved in:
Bibliographic Details
Published in:Nano letters 2018-04, Vol.18 (4), p.2505-2510
Main Authors: Bellunato, Amedeo, Vrbica, Sasha D, Sabater, Carlos, de Vos, Erik W, Fermin, Remko, Kanneworff, Kirsten N, Galli, Federica, van Ruitenbeek, Jan M, Schneider, Grégory F
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The investigation of the transport properties of single molecules by flowing tunneling currents across extremely narrow gaps is relevant for challenges as diverse as the development of molecular electronics and sequencing of DNA. The achievement of well-defined electrode architectures remains a technical challenge, especially due to the necessity of high precision fabrication processes and the chemical instability of most bulk metals. Here, we illustrate a continuously adjustable tunneling junction between the edges of two twisted graphene sheets. The unique property of the graphene electrodes is that the sheets are rigidly supported all the way to the atomic edge. By analyzing the tunneling current characteristics, we also demonstrate that the spacing across the gap junction can be controllably adjusted. Finally, we demonstrate the transition from the tunneling regime to contact and the formation of an atomic-sized junction between the two edges of graphene.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.8b00171