Contact gating at GHz frequency in graphene

Scientific Reports
Q WilmartB Plaçais

Abstract

The paradigm of graphene transistors is based on the gate modulation of the channel carrier density by means of a local channel gate. This standard architecture is subject to the scaling limit of the channel length and further restrictions due to access and contact resistances impeding the device performance. We propose a novel design, overcoming these issues by implementing additional local gates underneath the contact region which allow a full control of the Klein barrier taking place at the contact edge. In particular, our work demonstrates the GHz operation of transistors driven by independent contact gates. We benchmark the standard channel and novel contact gating and report for the later dynamical transconductance levels at the state of the art. Our finding may find applications in electronics and optoelectronics whenever there is need to control independently the Fermi level and the electrostatic potential of electronic sources or to get rid of cumbersome local channel gates.

References

Sep 13, 2002·Physical Review Letters·S HeinzePh Avouris
Aug 7, 2007·Physical Review Letters·B HuardD Goldhaber-Gordon
Jun 12, 2008·Nano Letters·Roman V GorbachevFrancisco Guinea
Sep 4, 2008·Physical Review Letters·G GiovannettiP J Kelly
Mar 5, 2009·Physical Review Letters·N StanderD Goldhaber-Gordon
Sep 2, 2009·Nano Letters·Young-Jun YuPhilip Kim
Nov 7, 2009·Nature Nanotechnology·Fengnian XiaPhaedon Avouris
Feb 6, 2010·Science·Y-M LinPh Avouris
Feb 8, 2011·Nature Nanotechnology·Fengnian XiaPhaedon Avouris
Feb 10, 2012·Nano Letters·Yanqing WuPhaedon Avouris
Aug 16, 2013·Nature Communications·Peter RickhausChristian Schönenberger
Dec 31, 2014·ACS Nano·Yoshiaki HattoriKosuke Nagashio

❮ Previous
Next ❯

Citations

Jul 8, 2017·Beilstein Journal of Nanotechnology·Guenther RuhlDaniel Neumaier
Jun 5, 2019·Nature Communications·H GraefB Plaçais
Nov 29, 2017·Nature Nanotechnology·Wei YangBernard Plaçais
Jul 22, 2019·Nanomaterials·Alejandro Toral-LopezAndres Godoy

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.