# Excitonic Mott insulator in a Bose-Fermi-Hubbard system of moiré WS2/WSe2 heterobilayer

https://mdr.nims.go.jp/datasets/d29fa79a-0454-4009-a5aa-7e8f74045ac2

## File

- [s41467-024-46616-x.pdf](https://mdr.nims.go.jp/filesets/e38c723c-02c3-44f8-894f-ee500e816ac6/download) ([Detail](https://mdr.nims.go.jp/filesets/e38c723c-02c3-44f8-894f-ee500e816ac6.md))

## Id

d29fa79a-0454-4009-a5aa-7e8f74045ac2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-07T05:19:05.654914Z

## Updated at

2025-02-07T07:30:49.192390Z

## Published at

2025-02-07T07:30:49.282657Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-46616-x

## Date published

2024-03-14

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Excitonic Mott insulator in a Bose-Fermi-Hubbard system of moiré WS2/WSe2
    heterobilayer
  title_type: original
  lang: en

## Description

- description: Understanding the Hubbard model is crucial for investigating various
    quantum many-body states and its fermionic and bosonic versions have been largely
    realized separately. Recently, transition metal dichalcogenides heterobilayers
    have emerged as a promising platform for simulating the rich physics of the Hubbard
    model. In this work, we explore the interplay between fermionic and bosonic populations,
    using a WS2/WSe2 heterobilayer device that hosts this hybrid particle density.
    We independently tune the fermionic and bosonic populations by electronic doping
    and optical injec- tion of electron-hole pairs, respectively. This enables us
    to form strongly interacting excitons that are manifested in a large energy gap
    in the photoluminescence spectrum. The incompressibility of excitons is further
    corroborated by measuring exciton diffusion, which remains constant upon increasing
    pumping intensity, as opposed to the expected behavior of a weakly interacting
    gas of bosons, suggesting the formation of a bosonic Mott insulator. We explain
    our observations using a two-band model including phase space filling. Our system
    provides a controllable approach to the exploration of quantum many-body effects
    in the generalized Bose-Fermi-Hubbard model.
  description_type: abstract
  lang: und

## Creator

- name: Beini Gao
  role: author
- name: Daniel G. Suárez-Forero
  role: author
- name: Supratik Sarkar
  role: author
- name: Tsung-Sheng Huang
  role: author
- name: Deric Session
  role: author
- name: Mahmoud Jalali Mehrabad
  role: author
- name: Ruihao Ni
  role: author
- name: Ming Xie
  role: author
- name: Pranshoo Upadhyay
  role: author
- name: Jonathan Vannucci
  role: author
- name: Sunil Mittal
  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: Atac Imamoglu
  role: author
- name: You Zhou
  role: author
- name: Mohammad Hafezi
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Moiré superlattices
  schema: not_defined
- subject: exciton correlations
  schema: not_defined
- subject: WSe2/WS2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '2305'

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## Specimen



## Chemical composition



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## Fileset

- id: e38c723c-02c3-44f8-894f-ee500e816ac6
  filename: s41467-024-46616-x.pdf
  content_type: application/pdf
  size: 1765058
  md5: 19f009bd27ddec72fece99e470184750

## Thumbnail

fileset_id: e38c723c-02c3-44f8-894f-ee500e816ac6
filename: s41467-024-46616-x.pdf