Graphene nanogap for gate-tunable quantum-coherent single-molecule electronics
Artikel i vetenskaplig tidskrift, 2011

We present atomistic calculations of quantum coherent electron transport through fulleropyrrolidine terminated molecules bridging a graphene nanogap. We predict that three difficult problems in molecular electronics with single molecules can be solved by utilizing graphene contacts: (1) a back gate modulating the Fermi level in the graphene leads facilitates control of the device conductance in a transistor effect with high on-off current ratio; (2) the size mismatch between leads and molecule is avoided, in contrast to the traditional metal contacts; (3) as a consequence, distinct features in charge flow patterns throughout the device are directly detectable by scanning techniques. We show that moderate graphene edge disorder is unimportant for the transistor function.

junctions

devices

gas

epitaxial graphene

resistance

transistors

films

transport

Författare

Anders Bergvall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Kristian Berland

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Per Hyldgaard

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Sergey Kubatkin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Tomas Löfwander

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 84

New Electronics Concept: Wafer-Scale Epitaxial Graphene (ConceptGraphene)

Europeiska kommissionen (FP7), 2010-10-01 -- 2013-09-30.

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Ämneskategorier

Fysik

Drivkrafter

Innovation och entreprenörskap

DOI

10.1103/PhysRevB.84.155451