Bipolar electron waveguides in graphene

We show analytically that the ability of Dirac materials to localize an electron in both a barrier and a well can be utilized to open a pseudogap in graphene's spectrum. By using narrow top gates as guiding potentials, we demonstrate that graphene bipolar waveguides can create a nonmonotonous o...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2020-10, Vol.102 (15), p.1, Article 155421
Main Authors: Hartmann, R. R., Portnoi, M. E.
Format: Article
Language:English
Subjects:
Electrons
Frequency ranges
Graphene
Waveguides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We show analytically that the ability of Dirac materials to localize an electron in both a barrier and a well can be utilized to open a pseudogap in graphene's spectrum. By using narrow top gates as guiding potentials, we demonstrate that graphene bipolar waveguides can create a nonmonotonous one-dimensional dispersion along the electron waveguide, whose electrostatically controllable pseudoband gap is associated with strong terahertz transitions in a narrow frequency range.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.102.155421