Scattering in gapped graphene quantum dot with magnetic flux

We study the propagation of electrons in a circular quantum dot of gapped graphene subject to the magnetic flux ϕ . We present analytical expressions for the eigenstates, scattering coefficients, scattering efficiency and radial component of the reflected current. We identify different scattering re...

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Bibliographic Details
Published inPhysica scripta Vol. 95; no. 10; pp. 105805 - 105814
Main Authors Lemaalem, Bouchaib, Belouad, Abdelhadi, Mekkaoui, Miloud, Jellal, Ahmed
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2020
Subjects
Circular quantum dot
Energy gap
Graphene
Magnetic flux
Scattering
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Summary:We study the propagation of electrons in a circular quantum dot of gapped graphene subject to the magnetic flux ϕ . We present analytical expressions for the eigenstates, scattering coefficients, scattering efficiency and radial component of the reflected current. We identify different scattering regimes as a function of the physical parameters such as the incident electronic energy, potential barrier, radius of quantum dot, gap and ϕ . We choose two values of the flux ϕ  = 1/2, 3/2 and show that for low energy of the incident electron, the scattering resonances appear and the far-field scattered current presents distinct preferred scattering directions.
Bibliography:PHYSSCR-111471.R1
ISSN:0031-8949
1402-4896
DOI:10.1088/1402-4896/abb632