Evidence map›Paper›PMID 38514632›Full record

ArticleNature communications2024

Electrically driven amplification of terahertz acoustic waves in graphene.

Aaron H Barajas-Aguilar, Jasen Zion, Ian Sequeira, Andrew Z Barabas, Takashi Taniguchi, Kenji Watanabe, Eric B Barrett, Thomas Scaffidi, Javier D Sanchez-Yamagishi

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Aaron H Barajas-AguilarDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.ORCID http://orcid.org/0000-0002-0432-5924
Jasen ZionT. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA, USA.
Ian SequeiraDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.
Andrew Z BarabasDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.
Takashi TaniguchiResearch Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan.ORCID http://orcid.org/0000-0002-1467-3105
Kenji WatanabeResearch Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan.ORCID http://orcid.org/0000-0003-3701-8119
Eric B BarrettDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.
Thomas ScaffidiDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.
Javier D Sanchez-YamagishiDepartment of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA. javier.sanchezyamagishi@uci.edu.ORCID http://orcid.org/0000-0001-9703-6525

Funding

National Science Foundation (NSF) DMR-2046849
6 · The paper itself

Abstract

In graphene devices, the electronic drift velocity can easily exceed the speed of sound in the material at moderate current biases. Under these conditions, the electronic system can efficiently amplify acoustic phonons, leading to an exponential growth of sound waves in the direction of the carrier flow. Here, we show that such phonon amplification can significantly modify the electrical properties of graphene devices. We observe a superlinear growth of the resistivity in the direction of the carrier flow when the drift velocity exceeds the speed of sound - resulting in a sevenfold increase over a distance of 8 µm. The resistivity growth is observed at carrier densities away from the Dirac point and is enhanced at cryogenic temperatures. We develop a theoretical model for the resistivity growth due to the electrical amplification of acoustic phonons - reaching frequencies up to 2.2 THz - where the wavelength is controlled by gate-tunable transitions across the Fermi surface. These findings provide a route to on-chip high-frequency sound generation and detection in the THz frequency range.

Identifiers

PMID38514632
PMCPMC10957956

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.