# Specular Electron Focusing between Gate-Defined Quantum Point Contacts in Bilayer Graphene

https://mdr.nims.go.jp/datasets/5ef2327c-ab69-47c5-8fad-41975a570212

## Files

- [acs.nanolett.3c00499.pdf](https://mdr.nims.go.jp/filesets/ad224967-c26a-4d26-924b-655c2a826ea7/download) ([Detail](https://mdr.nims.go.jp/filesets/ad224967-c26a-4d26-924b-655c2a826ea7.md))

## Id

5ef2327c-ab69-47c5-8fad-41975a570212

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-14T04:44:05.180082Z

## Updated at

2025-02-14T07:30:48.322566Z

## Published at

2025-02-14T07:30:48.425528Z

## Doi



## First published url

https://doi.org/10.1021/acs.nanolett.3c00499

## Date published

2023-06-28

## Recorded date published

2023-6-28

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Specular Electron Focusing between Gate-Defined Quantum Point Contacts in
    Bilayer Graphene
  title_type: original
  lang: en

## Description

- description: We report on multiterminal measurements in a ballistic bilayer graphene
    (BLG) channel where multiple spin and valley-degenerate quantum point contacts
    (QPCs) are defined by electrostatic gating. By patterning QPCs of different shapes
    and in different directions, we study the effect of size quantization and trigonal
    warping on the TEF spectra. Our results from transverse electron focusing (TEF)
    show eight clear peaks with comparable amplitude and weak signatures of quantum
    interference at the lowest temperature, indicating that reflections at the gate-defined
    edges are specular and transport is phase coherent. The temperature dependence
    of the scattering rates indicates that electron-electron interactions play a dominant
    role in the charge relaxation process at positive Vbg and for temperatures below
    100 K. Our findings thus demonstrate that the BLG tuneable bandgap can be used
    for the realization of gate-defined ballistic multiterminal devices and form the
    starting point for new coherent transport experiments in graphene-based devices.
  description_type: abstract
  lang: und

## Creator

- name: Josep Ingla-Aynés
  role: author
- name: Antonio L. R. Manesco
  role: author
- name: Talieh S. Ghiasi
  role: author
- name: Serhii Volosheniuk
  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: Herre S. J. van der Zant
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Ballistic bilayer graphene
  schema: not_defined
- subject: quantum point contacts
  schema: not_defined
- subject: transverse electron focusing
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nano Letters
  issn: '15306984'
  volume: '23'
  issue: '12'
  start_page: 5453
  end_page: 5459

## Conference



## Related item



## Funding

- identifier: '863098'
  funder_name: European Commission
- identifier: 016.Vidi.189.180
  funder_name: Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- identifier: '101027187'
  funder_name: European Commission
- identifier: 19H05790
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: 20H00354
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: 21H05233
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Custom property



## Fileset

- id: ad224967-c26a-4d26-924b-655c2a826ea7
  filename: acs.nanolett.3c00499.pdf
  content_type: application/pdf
  size: 3012910
  md5: 387f13ff84e57634f42c1079ed278a4c

## Thumbnail

fileset_id: ad224967-c26a-4d26-924b-655c2a826ea7
filename: acs.nanolett.3c00499.pdf