# Quantum oscillations in a dipolar excitonic insulator

https://mdr.nims.go.jp/datasets/08ae6e7a-1e1a-4a71-8cc2-3ee09d4fb64d

## File

- [s41563-025-02334-3.pdf](https://mdr.nims.go.jp/filesets/6f312cad-5f33-4fa6-9b0c-a229d32c455b/download) ([Detail](https://mdr.nims.go.jp/filesets/6f312cad-5f33-4fa6-9b0c-a229d32c455b.md))

## Id

08ae6e7a-1e1a-4a71-8cc2-3ee09d4fb64d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-05-17T00:57:14.417354Z

## Updated at

2026-05-18T00:28:12.830515Z

## Published at

2026-05-18T03:23:07.891002Z

## Doi



## First published url

https://doi.org/10.1038/s41563-025-02334-3

## Date published

2025-08-25

## Recorded date published

2026-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Quantum oscillations in a dipolar excitonic insulator
  title_type: original
  lang: en

## Description

- description: Quantum oscillations in magnetization or resistivity are a defining
    feature of metals subject to an external magnetic field. The phenomenon is generally
    not expected in insulators without a Fermi surface. The observations of quantum
    oscillations in Kondo insulating materials1-5 have provided a rare counterexample
    and attracted much theoretical interest6-12. However, the magnetic oscillations
    in correlated insulators remain poorly understood. Here we report the observations
    of resistivity quantum oscillations in an excitonic insulator realized in Coulomb-coupled
    electron- hole double layers13-21 with gate-tunability that allows the phenomenon
    to be explored in a more controllable fashion than in bulk materials. When the
    cyclotron energy of the electrons or holes is tuned to be comparable to or larger
    than the exciton binding energy, recurring transitions between excitonic insulators
    and electron-hole decoupled quantum Hall states are observed. Compressibility
    measurements show an oscillatory exciton binding energy as a function of magnetic
    field and electron-hole pair density. Coulomb drag measurements further reveal
    the formation of excitons with finite angular momentum. Our results are qualitatively
    captured by mean-field theory calculations22,23. The study demonstrates a new
    platform for studying quantum oscillations in correlated insulators.
  description_type: abstract
  lang: und

## Creator

- name: Phuong X. Nguyen
  role: author
- name: Raghav Chaturvedi
  role: author
- name: Bo Zou
  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: Allan H. MacDonald
  role: author
- name: Kin Fai Mak
  role: author
- name: Jie Shan
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: 'quantum oscillations
    '
  schema: not_defined
- subject: excitonic insulator
  schema: not_defined
- subject: electron-hole double layers
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-08-25

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Materials
  issn: '14764660'
  volume: '25'
  start_page: 42
  end_page: 48

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## Fileset

- id: 6f312cad-5f33-4fa6-9b0c-a229d32c455b
  filename: s41563-025-02334-3.pdf
  content_type: application/pdf
  size: 7915277
  md5: 5acbc7819dcfa082489712038e4c5b9c

## Thumbnail

fileset_id: 6f312cad-5f33-4fa6-9b0c-a229d32c455b
filename: s41563-025-02334-3.pdf