# High spatial resolution charge sensing of quantum Hall states

https://mdr.nims.go.jp/datasets/0af38485-da45-4491-83a4-d396c89cd0df

## File

- [chiu-et-al-2025-high-spatial-resolution-charge-sensing-of-quantum-hall-states.pdf](https://mdr.nims.go.jp/filesets/7cd2e64a-90ff-4751-81cf-ef0e78d7183e/download) ([Detail](https://mdr.nims.go.jp/filesets/7cd2e64a-90ff-4751-81cf-ef0e78d7183e.md))

## Id

0af38485-da45-4491-83a4-d396c89cd0df

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-28T10:28:31.931547Z

## Updated at

2026-03-21T06:07:32.228838Z

## Published at

2026-03-02T08:20:27.807316Z

## Doi



## First published url

https://doi.org/10.1073/pnas.2424781122

## Date published

2025-02-25

## Recorded date published

2025-2-25

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: High spatial resolution charge sensing of quantum Hall states
  title_type: original
  lang: en

## Description

- description: Charge distribution offers a unique fingerprint of important properties
    of electronic systems, including dielectric response, charge ordering and charge
    fractionalization. We develop a new architecture for charge sensing in two-dimensional
    electronic systems in a strong magnetic field. We probe local change of the chemical
    potential in a proximitized detector layer using scanning tunneling microscopy
    (STS), allowing us to infer the chemical potential and the charge profile in the
    sample. Our technique has both high energy (<0.3 meV) and spatial (<10 nm) resolution
    exceeding that of previous studies by an order of magnitude. We apply our technique
    to study the chemical potential of quantum Hall liquids in monolayer graphene
    under high magnetic fields and their responses to charge impurities. The chemical
    potential measurement provides a local probe of the thermodynamic gap of quantum
    Hall ferromagnets and fractional quantum Hall states. The screening charge profile
    reveals spatially oscillatory response of the quantum Hall liquids to charge impurities,
    and is consistent with the composite Fermi liquid picture close to the half-filling.
    Our technique also paves the way to map moiré potentials, probe Wigner crystals,
    and investigate fractional charges in quantum Hall and Chern insulators.
  description_type: abstract
  lang: und

## Creator

- name: Cheng-Li Chiu
  role: author
- name: Taige Wang
  role: author
- name: Ruihua Fan
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Xiaomeng Liu
  role: author
- name: Michael P. Zaletel
  role: author
- name: Ali Yazdani
  role: author

## Contact agent



## Publisher

organization: Proceedings of the National Academy of Sciences

## Managing organization



## Keyword

- subject: 'charge sensing
    '
  schema: not_defined
- subject: quantum Hall states
  schema: not_defined
- subject: 'scanning tunneling microscopy (STM)
    '
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/
  date_licensed: 2025-02-18

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Proceedings of the National Academy of Sciences
  issn: '10916490'
  volume: '122'
  issue: '8'
  article_number: e2424781122

## Conference



## Related item



## Funding

- identifier: DE-FG02-07ER46419
  funder_name: U.S. Department of Energy
- identifier: GBMF 9469
  funder_name: Gordon and Betty Moore Foundation
- identifier: DMR-2011750
  funder_name: National Science Foundation
- identifier: DMR-2312311
  funder_name: National Science Foundation
- identifier: OMA-2326767.
  funder_name: National Science Foundation
- identifier: ONR N00014-24-1-2471
  funder_name: DOD | USN | Office of Naval Research
- identifier: MURI 134396-5117989 (AROW911NF2120147
  funder_name: DOD | USA | AFC | CCDC | Army Research Office
- identifier: DE-AC02-05-CH11231
  funder_name: U.S. Department of Energy
- identifier: Fellowship
  funder_name: Heising-Simons Foundation
- identifier: Fellowship
  funder_name: Simons Foundation
- identifier: PHY-2309135
  funder_name: Shota Rustaveli National Science Foundation
- identifier: GBMF8688
  funder_name: Gordon and Betty Moore Foundation
- identifier: DE-AC02-05-CH11231
  funder_name: Department of Energy and Climate Change

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## Specimen



## Chemical composition



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## Fileset

- id: 7cd2e64a-90ff-4751-81cf-ef0e78d7183e
  filename: chiu-et-al-2025-high-spatial-resolution-charge-sensing-of-quantum-hall-states.pdf
  content_type: application/pdf
  size: 1529706
  md5: d08893981be585e5158fbaa4014e3a1b

## Thumbnail

fileset_id: 7cd2e64a-90ff-4751-81cf-ef0e78d7183e
filename: chiu-et-al-2025-high-spatial-resolution-charge-sensing-of-quantum-hall-states.pdf