# Negative electronic compressibility in charge islands in twisted bilayer graphene

https://mdr.nims.go.jp/datasets/25caeb45-f3dc-44a6-a579-c84a1ec9446f

## Files

- [2024A00489G_Negative_compressibility_of_charge_islands_within_twisted_bilayer_graphene_main.pdf](https://mdr.nims.go.jp/filesets/1a3051f9-e906-48b3-9d1e-3bd080beb7dc/download) ([Detail](https://mdr.nims.go.jp/filesets/1a3051f9-e906-48b3-9d1e-3bd080beb7dc.md))
- [2024A00489G_Negative_compressibility_of_charge_islands_within_twisted_bilayer_graphene_supp.pdf](https://mdr.nims.go.jp/filesets/0611bb97-0fd2-494c-b5c1-e82877d17985/download) ([Detail](https://mdr.nims.go.jp/filesets/0611bb97-0fd2-494c-b5c1-e82877d17985.md))

## Id

25caeb45-f3dc-44a6-a579-c84a1ec9446f

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-09-17T00:39:49.506755Z

## Updated at

2025-09-17T03:30:26.109553Z

## Published at

2025-09-17T03:18:25.685194Z

## Doi

https://doi.org/10.48505/nims.5765

## First published url

https://doi.org/10.1103/physrevb.109.155430

## Date published

2024-04-23

## Recorded date published

2024-4

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Negative electronic compressibility in charge islands in twisted bilayer
    graphene
  title_type: original
  lang: en

## Description

- description: We report on the observation of negative electronic compressibility
    in twisted bilayer graphene for Fermi energies close to insulating states. To
    observe this negative compressibility, we take advantage of naturally occurring
    twist-angle domains that emerge during the fabrication of the samples, leading
    to the formation of charge islands. We accurately measure their capacitance using
    Coulomb oscillations, from which we infer the compressibility of the electron
    gas. Notably, we not only observe the negative electronic compressibility near
    correlated insulating states at integer filling, but also prominently near the
    band insulating state at full filling, located at the edges of both the flat and
    remote bands. Furthermore, the individual twist-angle domains yield a well-defined
    carrier density, enabling us to quantify the strength of electronic interactions
    and verify the theoretical prediction that the inverse negative capacitance contribution
    is proportional to the average distance between the charge carriers. A detailed
    analysis of our findings suggests that Wigner crystallization is the most likely
    explanation for the observed negative electronic compressibility.
  description_type: abstract
  lang: en

## Creator

- name: Robin J. Dolleman
  role: author
- name: Alexander Rothstein
  role: author
- name: Ammon Fischer
  role: author
- name: Lennart Klebl
  role: author
- name: Lutz Waldecker
  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: Dante M. Kennes
  role: author
- name: Florian Libisch
  role: author
- name: Bernd Beschoten
  role: author
- name: Christoph Stampfer
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: twisted bilayer graphene
  schema: not_defined
- subject: negative electronic compressibility
  schema: not_defined
- subject: Wigner crystallization
  schema: not_defined

## Rights

- description: "©2025 American Physical Society."
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: 1550235X
  volume: '109'
  issue: '15'
  article_number: '155430'

## Conference



## Related item



## Funding

- funder_name: Deutsche Forschungsgemeinschaft
- identifier: '820254'
  funder_name: European Research Council
- identifier: 19H05790
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H00354
  funder_name: Japan Society for the Promotion of Science
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science

## 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



## Software



## Custom property



## Fileset

- id: 1a3051f9-e906-48b3-9d1e-3bd080beb7dc
  filename: 2024A00489G_Negative_compressibility_of_charge_islands_within_twisted_bilayer_graphene_main.pdf
  content_type: application/pdf
  size: 3437249
  md5: 12a5cee05125ef6c013345c3747f3bbf
- id: 0611bb97-0fd2-494c-b5c1-e82877d17985
  filename: 2024A00489G_Negative_compressibility_of_charge_islands_within_twisted_bilayer_graphene_supp.pdf
  content_type: application/pdf
  size: 10440354
  md5: 42659f05c542888be62b5dae892b5703

## Thumbnail

fileset_id: 1a3051f9-e906-48b3-9d1e-3bd080beb7dc
filename: 2024A00489G_Negative_compressibility_of_charge_islands_within_twisted_bilayer_graphene_main.pdf