Band structures and transport properties of zigzag graphene nanoribbons with antidot arrays

Abstract

We study the band and transport features of zigzag graphene nanoribbon with an antidot lattice. It is found that an antidot lattice could turn semi-metal graphene into a semiconductor. The size of the band gap can be tuned by the position of the antidots and the distance D between the two nearest antidots. For a finite superlattice with N antidots and a large D, a group of (N - 1) splitting resonant peaks and transmission-blockade regions appear alternately in the conductance spectrum. This indicates the formation of minibands and minigaps. In addition, Fano resonances can be observed when the antidots are localized near one edge of the nanoribbon. These features provide potential applications for graphene-based electronic and optoelectronic devices.

Transport in graphene antidot barriers and tunneling devices

“…Hence, antidot barriers enable tight confinement as well as effective transport barriers. theoretical side, several studies support the usefulness of antidot structures for transport devices [20][21][22][23][24]. In Refs.…”

“…In Refs. [20] and [21], GALs embedded in nanoribbons have been considered assuming full periodicity and a finite number of perforations, respectively. Interestingly, Ref.…”

“…Interestingly, Ref. [21] finds that transmission is highly sensitive to the number and sideways location of the antidots in the nanoribbon. Antidot lattices with full periodicity perpendicular to the transport direction have been studied in Refs.…”

Graphene: nanoscale processing and recent applications

“…128 Calculations of band structure and transport features show that an antidot lattice could turn the semi-metallic graphene into a semiconductor. The size of the band gap can be tuned by the position of the antidots and the distance D between the two nearest antidots.…”

Interaction of Boron-Nitrogen Substitued Graphene Nanoribbon with Nucleobases: The Idea of Biosensor

“…Due to the rapid progress in nano-technology, graphene nanoribbons become the promising nano-material for its extraordinary mechanical, electronic, and transport properties. Graphene nanoribbon gives the evidence of having large density of state at the edge near the Fermi level; due to this, it provides a golden opportunity to explore distinctive transport properties of GNR and has been investigated by many groups [7]. The nature of edge often plays an important role in properties of GNR.…”