Graphene nanogap for gate-tunable quantum-coherent single-molecule electronics
Journal article, 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

Author

Anders Bergvall

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Kristian Berland

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Per Hyldgaard

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Sergey Kubatkin

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Tomas Löfwander

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 84 15

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

European Commission (FP7), 2010-10-01 -- 2013-09-30.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Subject Categories

Physical Sciences

Driving Forces

Innovation and entrepreneurship

DOI

10.1103/PhysRevB.84.155451

More information

Created

10/7/2017