# Comprehensive Electrostatic Modeling of Exposed Quantum Dots in Graphene/Hexagonal Boron Nitride Heterostructures

https://mdr.nims.go.jp/datasets/1c0b23a5-5c0d-4c7a-bbf7-4045ea7bbf86

## File

- [nanomaterials-10-01154-v2.pdf](https://mdr.nims.go.jp/filesets/c8b8e778-df47-4d56-b85a-4bfd856fb9c6/download) ([Detail](https://mdr.nims.go.jp/filesets/c8b8e778-df47-4d56-b85a-4bfd856fb9c6.md))

## Id

1c0b23a5-5c0d-4c7a-bbf7-4045ea7bbf86

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-25T08:20:48.008420Z

## Updated at

2025-02-26T07:30:13.102213Z

## Published at

2025-02-26T07:30:13.352949Z

## Doi



## First published url

https://doi.org/10.3390/nano10061154

## Date published

2020-06-12

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Comprehensive Electrostatic Modeling of Exposed Quantum Dots in Graphene/Hexagonal
    Boron Nitride Heterostructures
  title_type: original
  lang: en

## Description

- description: 'Recent experimental advancements have enabled the creation of tunable
    localized electrostatic potentials in graphene/hexagonal boron nitride (hBN) heterostructures
    without concealing the graphene surface. These potentials corral graphene electrons
    yielding systems akin to electrostatically defined quantum dots (QDs). Spectroscopic
    characterization of these exposed QDs with the scanning tunneling microscope (STM)
    have revealed intriguing resonances that are consistent with a tunneling probability
    of 100% across the QD walls. This effect, known as Klein tunneling, is emblematic
    of relativistic particles, underscoring the uniqueness of these graphene QDs.
    Despite the advancements with electrostatically defined graphene QDs, a complete
    understanding of their spectroscopic features still remains elusive. In this study,
    we address this lapse in knowledge by comprehensively considering the electrostatic
    environment of exposed graphene QDs. We then implement these considerations into
    tight binding calculations to enable simulations of the graphene QD local density
    of states. We find that the inclusion of the STM tip’s electrostatics in conjunction
    with that of the underlying hBN charges reproduces all of the experimentally resolved
    spectroscopic features. Our work provides an effective approach for modeling the
    electrostatics of exposed graphene QDs. The methods discussed here can be applied
    to other electrostatically defined QD systems that are also exposed. '
  description_type: abstract
  lang: und

## Creator

- name: Eberth A. Quezada-López
  role: author
- name: Zhehao Ge
  role: author
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Frédéric Joucken
  role: author
- name: Jairo Velasco
  role: author

## Contact agent



## Publisher

organization: MDPI AG

## Managing organization



## Keyword

- subject: Electrostatic potentials
  schema: not_defined
- subject: graphene/hexagonal boron nitride
  schema: not_defined
- subject: quantum dots
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nanomaterials
  issn: '20794991'
  volume: '10'
  issue: '6'
  article_number: '1154'

## Conference



## Related item



## Funding

- identifier: DMR-1753367
  funder_name: NSF

## 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



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## Fileset

- id: c8b8e778-df47-4d56-b85a-4bfd856fb9c6
  filename: nanomaterials-10-01154-v2.pdf
  content_type: application/pdf
  size: 2702782
  md5: 8e6d293101c62cc9f1563d867eda29cf

## Thumbnail

fileset_id: c8b8e778-df47-4d56-b85a-4bfd856fb9c6
filename: nanomaterials-10-01154-v2.pdf