Work

Energy spectrum of bilayer graphene with magnetic quantum structures studied using the Dirac equation

Year: 2021

Type: article

Abstract: The electronic energy spectrum of bilayer graphene with a magnetic quantum dot (MQD) and a magnetic quantum ring (MQR) are investigated. The energy eigenvalues and wavefunctions of quasiparticle states are calculated analytically by solving decoupled fourth-order differential equations. For the MQD, in the case of a negative inner magnetic field, two peculiar characteristics of the eigenvalue evolution are found: (a) the energy eigenstates change in a stepwise manner owing to energy anticrossing and (b) the quantum states approach zero energy. For the MQR, there is an angular momentum transition of eigenvalue as the inner radius of the ring varies, and the Aharonov–Bohm effect is observed in the eigenvalue spectra for both positive and negative magnetic fields inside the inner radius.

Source: Semiconductor Science and Technology

DOI: 10.1088/1361-6641/ac2964

Authors: Daehan Park, Heesang Kim, Nammee Kim

Institution: Soongsil University

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,850

Funders: National Research Foundation, National Research Foundation of Korea, Ministry of Science and ICT, South Korea