Electron and spin transport in adiabatic quantum pumps based on graphene nanoribbons

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776111140159· OSTI ID:22027996

Manykin, E A ^[1]

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1. 'Moscow Engineering Physics Institute' National Research Nuclear University (Russian Federation)

The adiabatic quantum pump effect in double-barrier structures based on graphene nanoribbons has been analyzed numerically. The charge transmitted through the system in one cycle of variation of pumping potentials (barrier heights) has been calculated. This charge is shown to be quantized under certain conditions. The possibility of the generation of not only electron currents but also spin and purely spin ones is considered. In devices based on zigzag nanoribbons, the spin current emerges when taking into account their magnetic structure and applying a transverse electric field breaking the symmetry between the up and down spins. In devices based on armchair nanoribbons without any magnetic structure, this symmetry breaks when using a ferromagnetic insulator (deposited, for example, on the region between gates) through the proximity effect.

• OSTI ID: 22027996
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 113, Issue 4; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ADIABATIC PROCESSES
CHARGE TRANSPORT
CURRENTS
ELECTRIC FIELDS
ELECTRONS
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GRAPHITE
NANOSTRUCTURES
NUMERICAL ANALYSIS
POTENTIALS
PROXIMITY EFFECT
PUMPING
PUMPS
SPIN
SYMMETRY
VARIATIONS