Title
Energy levels of hybrid monolayer-bilayer graphene quantum dots Energy levels of hybrid monolayer-bilayer graphene quantum dots
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
PHYSICAL REVIEW B
Volume/pages
93(2016) :16 , 11 p.
ISSN
2469-9950
Article Reference
165410
ISI
000373572700004
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Often real samples of graphene consist of islands of both monolayer and bilayer graphene. Bound states in such hybrid quantum dots are investigated for (i) a circular single-layer graphene quantum dot surrounded by an infinite bilayer graphene sheet and (ii) a circular bilayer graphene quantum dot surrounded by an infinite single-layer graphene. Using the continuum model and applying zigzag boundary conditions at the single-layer-bilayer graphene interface, we obtain analytical results for the energy levels and the corresponding wave spinors. Their dependence on perpendicular magnetic and electric fields are studied for both types of quantum dots. The energy levels exhibit characteristics of interface states, and we find anticrossings and closing of the energy gap in the presence of a bias potential.
E-info
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/d0a73e/133261.pdf
Handle