Zero-energy states in graphene quantum dot with wedge disclination

TL;DR

This paper studies how wedge disclinations affect the electronic properties of graphene quantum dots, revealing that such defects can modify resonance peaks in the density of states, which is crucial for nanoelectronic applications.

Contribution

It introduces an analysis of wedge disclination effects on charge carriers in graphene quantum dots, highlighting how defects influence resonance features in the density of states.

Findings

Wedge disclinations alter the amplitude, width, and position of resonance peaks.

Density of states exhibits multiple resonance peaks affected by disclinations.

The study provides insights into defect engineering in graphene-based quantum devices.

Abstract

We investigate the effects of wedge disclination on charge carriers in circular graphene quantum dots subjected to a magnetic flux. Using the asymptotic solutions of the energy spectrum for large arguments, we approximate the scattering matrix elements, and then study the density of states. It is found that the density of states shows several resonance peaks under various conditions. In particular, it is shown that the wedge disclination is able to change the amplitude, width, and positions of resonance peaks.