Resonant Tunneling through S- and U-shaped Graphene Nanoribbons

TL;DR

This paper theoretically explores how resonant tunneling occurs in S- and U-shaped graphene nanoribbons, revealing tunable quantum transport properties driven by structural modifications without external gating.

Contribution

It introduces a novel theoretical analysis of resonant tunneling in complex-shaped graphene nanoribbons, highlighting tunability through geometric adjustments alone.

Findings

Multiple resonant tunneling peaks from different quasi-bound states

Tunneling current can be controlled by Fermi energy adjustments

Resonant tunneling tunability achieved without external gates

Abstract

We theoretically investigate resonant tunneling through S- and U-shaped nanostructured graphene nanoribbons. A rich structure of resonant tunneling peaks are found eminating 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.