Energy levels of hybrid monolayer-bilayer graphene quantum dots

M. Mirzakhani, M. Zarenia, S. A. Ketabi, D. R. Da Costa, F. M. Peeters

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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.

Original languageEnglish (US)
Article number165410
JournalPhysical Review B
Volume93
Issue number16
DOIs
StatePublished - Apr 8 2016

Bibliographical note

Funding Information:
This work was supported by the Fonds Wetenschappelijk Onderzoek (FWO)-CNPq project between Flanders and Brazil and the Brazilian Science Without Borders program.

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