J. J. P. Thompson
Valley-polarized tunneling currents in bilayer graphene tunneling transistors
Thompson, J. J. P.; Leech, D. J.; Mucha-Kruczy?ski, M.
Authors
Damien Leech Damien.Leech@uwe.ac.uk
Research Associate: CFPR - Woodbury and Lippman Research
M. Mucha-Kruczy?ski
Abstract
We study theoretically the electron current across a monolayer graphene/hexagonal boron nitride/bilayer graphene tunneling junction in an external magnetic field perpendicular to the layers. We show that change in effective tunneling barrier width for electrons on different graphene layers of bilayer graphene, coupled with the fact that its Landau level wave functions are not equally distributed amongst the layers with a distribution that is reversed between the two valleys, lead to valley polarization of the tunneling current. We estimate that valley polarization ∼70% can be achieved in high quality devices at B=1 T. Moreover, we demonstrate that strong valley polarization can be obtained both in the limit of strong-momentum-conserving tunneling and in lower quality devices where this constraint is lifted.
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 20, 2019 |
Publication Date | Feb 15, 2019 |
Deposit Date | Mar 5, 2019 |
Publicly Available Date | Mar 5, 2019 |
Journal | Physical Review B |
Print ISSN | 2469-9950 |
Electronic ISSN | 2469-9969 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 99 |
Issue | 8 |
Article Number | 085420 |
DOI | https://doi.org/10.1103/PhysRevB.99.085420 |
Keywords | graphene, transistors, physics, nanoscience, Van der Waals heterostuctures, 2D materials, tunnel junctions, valley |
Public URL | https://uwe-repository.worktribe.com/output/852243 |
Publisher URL | https://doi.org/10.1103/PhysRevB.99.085420 |
Additional Information | Additional Information : (c) American Physical Society. |
Contract Date | Mar 5, 2019 |
Files
10.1103@PhysRevB.99.085420.pdf
(1.7 Mb)
PDF
You might also like
And now for something completely different: Woodburytype
(2019)
Presentation / Conference Contribution
The Physics of Print
(2020)
Presentation / Conference Contribution
Woodburytype: A historical process resurrected by modern methods
(2020)
Journal Article
Continuous Tone Printing from Gel Matrices - The Woodburytype
(2020)
Presentation / Conference Contribution
Downloadable Citations
About UWE Bristol Research Repository
Administrator e-mail: repository@uwe.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2025
Advanced Search