Liang, Qifeng and Dong, Jinming (2008) Superconducting switch made of graphene-nanoribbon junctions. NANOTECHNOLOGY, 19 (35).
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Official URL: http://dx.doi.org/10.1088/0957-4484/19/35/355706
Abstract
The transmission of superconductor-graphene nanoribbon-superconductor junctions (SGS) has been studied by the non-equilibrium Green's function method. It is found that the on-site potential U in the center zigzag graphene nanoribbon (ZGNR) of the SGS junction plays an important role in the magnitude of the supercurrent I-c. As the effective Fermi energy mu(eff) (mu(eff) = mu(F)-U) goes from negative to positive, the SGS junction would suddenly transform from an `OFF' state to an `ON' state. And, as mu(eff) increases further, the Ic will continue to increase. This switching behavior of the SGS junction shares the same origin with the zigzag GNR valley-isospin valve (Rycerz et al 2007 Nat. Phys. 3 172). Besides the valley-isospin, the density of states will also have an effect on the suppression of Ic.
| Item Type: | Article |
|---|---|
| Subjects: | Physical Science > Nanophysics Technology > Nanotechnology and energy applications Engineering > Nanotechnology applications in ICT |
| ID Code: | 3025 |
| Deposited By: | Anuj Seth |
| Deposited On: | 12 Jan 2009 10:12 |
| Last Modified: | 22 Jan 2009 15:40 |
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