https://doi.org/10.1140/epjb/e2010-10432-2
Supercurrent switching effect in zigzag graphene nanoribbons
1
National Laboratory of Solid State Microstructures and
Department of Physics, Nanjing University, Nanjing, 210093, P.R. China
2
College of Science, Nanjing University of Aeronautics
and Astronautics, Nanjing, 210016, P.R. China
Corresponding author: a zpniu@nuaa.edu.cn
Received:
1
June
2010
Revised:
18
August
2010
Published online:
3
November
2010
The non-equilibrium Green's function approach is applied to investigate dc Josephson currents in S/ZGNR/S junctions, where ZGNR is the zigzag graphene nanoribbon and S is the s-wave superconductor. If the middle ZGNR is half-metallic ferromagnetic, the supercurrent changes from vanishing to a finite value when the gate voltage is adjusted, exhibiting a supercurrent switching effect.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010