# Gate-tunable Veselago interference in a bipolar graphene microcavity

https://mdr.nims.go.jp/datasets/b4b2a6b1-bc81-4803-96df-63bc0f84bfaa

## File

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## Id

b4b2a6b1-bc81-4803-96df-63bc0f84bfaa

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-26T07:52:47.923706Z

## Updated at

2025-02-27T07:30:33.643026Z

## Published at

2025-02-27T07:30:33.807765Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-34347-w

## Date published

2022-11-07

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Gate-tunable Veselago interference in a bipolar graphene microcavity
  title_type: original
  lang: en

## Description

- description: 'The relativistic charge carriers in monolayer graphene can be manipulated
    in manners akin to conventional optics(electron-optics): angle-dependent Klein
    tunneling collimates an electron beam (analogous to a laser), while a Veselago
    refraction process focuses it (analogous to an optical lens). Both processes have
    been previously investigated, but the collimation and focusing efficiency have
    been reported to be relatively low even in state-of-the-art ballistic PN-junction
    devices. These limitations prevent the realization of more advanced quantum devices
    based on electron-optical interference, and the underlying physics remains elusive.
    In this work, we develop a novel device architecture of a graphene microcavity
    defined by carefully-engineered local strain and electrostatics. We realize a
    controlled electron-optic interference process at zero magnetic field via a consequence
    of consecutive Veselago refractions in the microcavity and demonstrate direct
    experimental evidence via low-temperature electrical transport measurement. First,
    we show that the observed interference peaks (first-, second-, and third-order)
    agree quantitatively with the Veselago physics in a microcavity. Second, we demonstrate
    decoherence of the interference by an external magnetic field, as the cyclotron
    radius becomes comparable to the interference length scale. For its application
    in electron-optics, we utilize Veselago interference to further localize uncollimated
    electrons and characterize its contribution in further improving collimation efficiency.
    Our work sheds new light on relativistic single-particle physics and provides
    important technical improvement toward next-generation quantum devices based on
    the coherent manipulation of electron momentum and trajectory. '
  description_type: abstract
  lang: und

## Creator

- name: Xi Zhang
  role: author
- name: Wei Ren
  role: author
- name: Elliot Bell
  role: author
- name: Ziyan Zhu
  role: author
- name: Kan-Ting Tsai
  role: author
- name: Yujie Luo
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Efthimios Kaxiras
  role: author
- name: Mitchell Luskin
  role: author
- name: Ke Wang
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: elativistic charge carriers
  schema: not_defined
- subject: graphene microcavity
  schema: not_defined
- subject: Veselago interference
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '6711'

## Conference



## Related item



## Funding

- identifier: ARO MURI Grant No. W911NF14-0247
  funder_name: United States Department of Defense | United States Army | U.S. Army
    Research, Development and Engineering Command | Army Research Office

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## Fileset

- id: 48564ac9-69a8-47f6-a81b-fec27acff7f4
  filename: s41467-022-34347-w.pdf
  content_type: application/pdf
  size: 2461771
  md5: bc8b62480754373a11468b324bf597ac

## Thumbnail

fileset_id: 48564ac9-69a8-47f6-a81b-fec27acff7f4
filename: s41467-022-34347-w.pdf