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Optical and Quantum Electronics

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01-12-2023

Impacts of electric and magnetic fields on the optical and electronic characteristics of graphene- based multibarrier structure

Authors: Walid Belhadj, Hassen Dakhlaoui, Omar H. Alsalmi, Fatih Ungan

Published in: Optical and Quantum Electronics | Issue 13/2023

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Abstract

The conductance and electronic transmission of Dirac electrons and holes across multibarrier Cantor-like graphene are investigated using on the transfer matrix method and Landauer–Buttiker formalism. Electric and magnetic fields are applied to the top of a monolayer graphene to generate multiple electromagnetic barriers separated by quantum wells. The impact of the magnetic and electric fields as well as the quantum size on the behavior of the transmission coefficient and conductance is discussed. The results indicate that the transmission coefficients exhibit oscillations indicating the existence of resonant states in miniband energies separated by minigap energies. This phenomenon known as the bifurcation process is more pronounced for a higher number of barriers. The behavior observed in the conductance variation reflects of the transmission coefficient especially for lower energies. Furthermore, the contour plot of the transmission coefficient shows the predominant impact of the incidence angle on the symmetry of the minigaps and minibands. These results are expected to be beneficial for experiments that improve the performance of new generations of devices based on multibarrier Cantor-like graphene systems.

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Title: Impacts of electric and magnetic fields on the optical and electronic characteristics of graphene- based multibarrier structure
Authors: Walid Belhadj
Hassen Dakhlaoui
Omar H. Alsalmi
Fatih Ungan
Publication date: 01-12-2023
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 13/2023
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-023-05430-3

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