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Proceedings Paper

Graphene-based integrated electronic, photonic and spintronic circuit
Author(s): P. Potasz; A. D. Güçlü; I. Ozfidan; M. Korkusinski; P. Hawrylak
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Paper Abstract

To create carbon-based nanoscale integrated electronic, photonic, and spintronic circuit one must demonstrate the three functionalities in a single material, graphene quantum dots (GQDs), by engineering lateral size, shape, edges, number of layers and carrier density. We show theoretically that spatial confinement in GQDs opens an energy gap tunable from UV to THz, making GQDs equivalent to semiconductor nanoparticles. When connected to leads, GQDs act as single-electron transistors. The energy gap and absorption spectrum can be tuned from UV to THz by size and edge engineering and by external electric and magnetic fields. The sublattice engineering in, e.g., triangular graphene quantum dots (TGQDs) with zigzag edges generates a finite magnetic moment. The magnetic moment can be controlled by charging, electrical field, and photons. Addition of a single electron to the charge-neutral system destroys the ferromagnetic order, which can be restored by absorption of a photon. This allows for an efficient spin-photon conversion. These results show that graphene quantum dots have potential to fulfill the three functionalities: electronic, photonic, and spintronic, realized with different materials in current integrated circuits, as well as offer new functionalities unique to graphene.

Paper Details

Date Published: 29 May 2013
PDF: 8 pages
Proc. SPIE 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V, 87250G (29 May 2013); doi: 10.1117/12.2016607
Show Author Affiliations
P. Potasz, National Research Council Canada (Canada)
Wroclaw Univ. of Technology (Poland)
A. D. Güçlü, National Research Council Canada (Canada)
Izmir Institute of Technology (Turkey)
I. Ozfidan, National Research Council Canada (Canada)
Univ. of Ottawa (Canada)
M. Korkusinski, National Research Council Canada (Canada)
P. Hawrylak, National Research Council Canada (Canada)
Univ. of Ottawa (Canada)


Published in SPIE Proceedings Vol. 8725:
Micro- and Nanotechnology Sensors, Systems, and Applications V
Thomas George; M. Saif Islam; Achyut K. Dutta, Editor(s)

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