Abstract
Relativistic massless charged particles in a two-dimensional conductor can be guided by a one-dimensional electrostatic potential, in an analogous manner to light guided by an optical fiber. We use a carbon nanotube to generate such a guiding potential in graphene and create a single mode electronic waveguide. The nanotube and graphene are separated by a few nanometers and can be controlled and measured independently. As we charge the nanotube, we observe the formation of a single guided mode in graphene that we detect using the same nanotube as a probe. This single electronic guided mode in graphene is sufficiently isolated from other electronic states of linear Dirac spectrum continuum, allowing the transmission of information with minimal distortion.
- Received 4 September 2019
DOI:https://doi.org/10.1103/PhysRevLett.123.216804
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Focus
A Graphene Waveguide For Electrons
Published 22 November 2019
A new waveguide that uses a nanotube to guide electrons could lead to novel types of circuitry in quantum computers.
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