Resonant tunneling through S- and U-shaped graphene nanoribbons

We theoretically investigate resonant tunneling through S- and U-shaped nanostructured graphene nanoribbons. A rich structure of resonant tunneling peaks is found emanating from different quasi-bound states in the middle region. The tunneling current can be turned on and off by varying the Fermi energy. Tunability of resonant tunneling is realized by changing the width of the left and/or right leads and without the use of any external gates.

NSF of China 60525405 10874175Flemish Science Foundation FWO-V1 Belgian Science policy This work is supported by the NSF of China grant nos. 60525405 and 10874175 the project from CAS the Flemish Science Foundation (FWO-V1) and the Belgian Science policy.