Resonant tunneling through double-bended graphene nanoribbons
Abstract
We investigate theoretically resonant tunneling through double-bended graphene nanoribbon (GNR) structures, i.e., armchair-edged GNRs (AGNRs) in between two semi-infinite zigzag GNR leads. Our numerical results demonstrate that the resonant tunneling can be tuned dramatically by the Fermi energy and the length and/or widths of the AGNR for both the metallic and semiconductorlike AGNRs. The structure can also be use to control the valley polarization of the tunneling currents and could be useful for potential application in valleytronics devices.
- Publication:
-
Applied Physics Letters
- Pub Date:
- August 2008
- DOI:
- 10.1063/1.2970957
- arXiv:
- arXiv:0805.1438
- Bibcode:
- 2008ApPhL..93f2106Z
- Keywords:
-
- 73.40.Gk;
- 73.21.-b;
- 73.22.-f;
- Tunneling;
- Electron states and collective excitations in multilayers quantum wells mesoscopic and nanoscale systems;
- Electronic structure of nanoscale materials: clusters nanoparticles nanotubes and nanocrystals;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- 4 pages, 4 figures