Version 1
: Received: 22 April 2024 / Approved: 23 April 2024 / Online: 23 April 2024 (09:43:55 CEST)
How to cite:
Rycerz, A.; Rycerz, K.; Witkowski, P. Sub-Sharvin Conductance and Incoherent Shot-Noise in Graphene Disks at Magnetic Field. Preprints2024, 2024041507. https://doi.org/10.20944/preprints202404.1507.v1
Rycerz, A.; Rycerz, K.; Witkowski, P. Sub-Sharvin Conductance and Incoherent Shot-Noise in Graphene Disks at Magnetic Field. Preprints 2024, 2024041507. https://doi.org/10.20944/preprints202404.1507.v1
Rycerz, A.; Rycerz, K.; Witkowski, P. Sub-Sharvin Conductance and Incoherent Shot-Noise in Graphene Disks at Magnetic Field. Preprints2024, 2024041507. https://doi.org/10.20944/preprints202404.1507.v1
APA Style
Rycerz, A., Rycerz, K., & Witkowski, P. (2024). Sub-Sharvin Conductance and Incoherent Shot-Noise in Graphene Disks at Magnetic Field. Preprints. https://doi.org/10.20944/preprints202404.1507.v1
Chicago/Turabian Style
Rycerz, A., Katarzyna Rycerz and Piotr Witkowski. 2024 "Sub-Sharvin Conductance and Incoherent Shot-Noise in Graphene Disks at Magnetic Field" Preprints. https://doi.org/10.20944/preprints202404.1507.v1
Abstract
Highly-doped graphene samples show the conductance reduced and the shot-noise
power enhanced compared to standard ballistic systems in two-dimensional
electron gas. These features can be understood within a model assuming
incoherent scattering of Dirac electrons between two interfaces separating the
sample and the leads. Here we find, by adopting the above-mentioned model for
the edge-free (Corbino) geometry and by means of the computer simulation of
quantum transport, that another graphene-specific feature should be observable
when the current flow through a doped disk is blocked by high magnetic field.
In case the conductance drops to zero, the Fano factor approaches the value of
$F\approx{}0.56$, with a very weak dependence on the disk radii ratio. The role
of finite source-drain voltages and the system behavior upon tuning the
electrostatic potential barrier from a rectangular to parabolic shape are also
discussed.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
