# Spin transport of a doped Mott insulator in moiré heterostructures

https://mdr.nims.go.jp/datasets/d1767b8a-f706-4062-b111-683da1ba03fe

## Files

- [s41467-024-54633-z.pdf](https://mdr.nims.go.jp/filesets/dc205924-91c1-4acd-886f-6ee51f680fc3/download) ([Detail](https://mdr.nims.go.jp/filesets/dc205924-91c1-4acd-886f-6ee51f680fc3.md))

## Id

d1767b8a-f706-4062-b111-683da1ba03fe

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T06:30:38.817580Z

## Updated at

2025-02-06T03:30:44.488579Z

## Published at

2025-02-06T03:30:44.572320Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-54633-z

## Date published

2024-11-26

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Spin transport of a doped Mott insulator in moiré heterostructures
  title_type: original
  lang: en

## Description

- description: 'Moiré superlattices of semiconducting transition metal dichalcogenide
    (TMD) heterobilayers are model systems for investigating strongly correlated electronic
    phenomena [1-12]. Specifically, WSe2/WS2 moiré superlattices have emerged as quantum
    simulators for the 2D extended Hubbard model [1, 2], which hosts fascinating correlated
    charge and spin physics. Experimental studies of charge transport have revealed
    correlated Mott insulator [1, 2] and generalized Wigner crystal states [1], but
    spin transport of the moiré heterostructure has not yet been explored.  Here,
    we use spatial- and temporal-resolved circular dichroism spectroscopy to directly
    image the spin transport as a function of carrier doping and temperature in WSe2/WS2
    moiré heterostructures. We demonstrate temperature and doping dependent spin transport
    in the moiré superlattice: we observe diffusive spin transport at all hole concentrations
    at 11 Kelvin, including the Mott insulator at one hole per moiré unit cell, where
    charge transport is strongly suppressed. At elevated temperatures the spin diffusion
    constant remains unchanged at the Mott insulator state, but it increases significantly
    at finite doping away from the Mott state. The doping- and temperature-dependent
    spin transport can be qualitatively understood using a t-J model, where spins
    can move via hopping of spin-carrying charges and via the exchange interaction.
    From the spin diffusion constant, we can estimate the effective kinetic tunneling
    energy (t) and exchange energies (J) in the superlattice. Our results demonstrate
    opportunities for exploring novel spin physics in correlated electronic systems
    using TMD moiré superlattices. '
  description_type: abstract
  lang: und

## Creator

- name: Emma C. Regan
  role: author
  orcid: https://orcid.org/0000-0002-9100-6031
- name: Zheyu Lu
  role: author
- name: Danqing Wang
  role: author
- name: Yang Zhang
  role: author
  orcid: https://orcid.org/0000-0003-4630-5056
- name: Trithep Devakul
  role: author
  orcid: https://orcid.org/0000-0002-4129-897X
- name: Jacob H. Nie
  role: author
- name: Zuocheng Zhang
  role: author
  orcid: https://orcid.org/0000-0001-7851-6101
- name: Wenyu Zhao
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: Sefaattin Tongay
  role: author
  orcid: https://orcid.org/0000-0001-8294-984X
- name: Alex Zettl
  role: author
- name: Liang Fu
  role: author
  orcid: https://orcid.org/0000-0002-8803-1017
- name: Feng Wang
  role: author
  orcid: https://orcid.org/0000-0001-8369-6194

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Moiré superlattices
  schema: not_defined
- subject: spin transport
  schema: not_defined
- subject: WSe2/WS2
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '10252'

## Conference



## Related item



## Funding

- identifier: DE-AC02-05-CH11231
  funder_name: U.S. Department of Energy

## 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



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## Fileset

- id: dc205924-91c1-4acd-886f-6ee51f680fc3
  filename: s41467-024-54633-z.pdf
  content_type: application/pdf
  size: 1332333
  md5: 0b6eea4e8f0483a35c289b7ed4b5982e

## Thumbnail

fileset_id: dc205924-91c1-4acd-886f-6ee51f680fc3
filename: s41467-024-54633-z.pdf