# Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe2

https://mdr.nims.go.jp/datasets/37198236-ac33-4909-8854-4003faeb1228

## File

- [s41467-023-39855-x.pdf](https://mdr.nims.go.jp/filesets/85c8dcab-1df4-4955-8abb-bb0544b99675/download) ([Detail](https://mdr.nims.go.jp/filesets/85c8dcab-1df4-4955-8abb-bb0544b99675.md))

## Id

37198236-ac33-4909-8854-4003faeb1228

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-14T07:46:24.181856Z

## Updated at

2025-02-15T03:31:01.421817Z

## Published at

2025-02-15T03:31:01.526503Z

## Doi



## First published url

https://doi.org/10.1038/s41467-023-39855-x

## Date published

2023-07-08

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted
    bilayer graphene on WSe2
  title_type: original
  lang: en

## Description

- description: New phases of matter can be stabilized by a combination of diverging
    electronic density of states, strong interactions, and spin-orbit coupling. Recent
    experiments in magic-angle twisted bilayer graphene (TBG) have uncovered a wealth
    of novel phases as a result of interaction-driven spin-valley flavour polarization.
    In this work, we explore correlated phases appearing due to the combined effect
    of spin-orbit coupling-enhanced valley polarization and large density of states
    below half filling (ν ≲ 2) of the moiré band in a TBG coupled to tungsten diselenide.
    We observe anomalous Hall effect, accompanied by a series of Lifshitz transitions,
    that are highly tunable with carrier density and magnetic field. Strikingly, the
    magnetization shows an abrupt sign change in the vicinity of half-filling, confirming
    its orbital nature. The coercive fields reported are about an order of magnitude
    higher than previous studies in graphene-based moiré systems, presumably aided
    by a Stoner instability favoured by the van Hove singularities in the malleable
    bands. While the Hall resistance is not quantized at zero magnetic fields, indicative
    of a ground state with partial valley polarization, perfect quantization and complete
    valley polarization are observed at finite fields. Our findings illustrate that
    singularities in the flat bands in the presence of spin-orbit coupling can stabilize
    ordered phases even at non-integer moiré band fillings.
  description_type: abstract
  lang: und

## Creator

- name: Saisab Bhowmik
  role: author
- name: Bhaskar Ghawri
  role: author
- name: Youngju Park
  role: author
- name: Dongkyu Lee
  role: author
- name: Suvronil Datta
  role: author
- name: Radhika Soni
  role: author
- name: K. Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: T. Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Arindam Ghosh
  role: author
- name: Jeil Jung
  role: author
- name: U. Chandni
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Spin-orbit coupling
  schema: not_defined
- subject: anomalous Hall effect
  schema: not_defined
- subject: Lifshitz transitions
  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: '14'
  issue: '1'
  article_number: '4055'

## Conference



## Related item



## Funding

- identifier: SPG/2020/000164
  funder_name: DST | Science and Engineering Research Board
- identifier: WEA/2021/000005
  funder_name: DST | Science and Engineering Research Board

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: 85c8dcab-1df4-4955-8abb-bb0544b99675
  filename: s41467-023-39855-x.pdf
  content_type: application/pdf
  size: 3115096
  md5: 8d98fd3a064ba73bebee3dbf3ece3cc4

## Thumbnail

fileset_id: 85c8dcab-1df4-4955-8abb-bb0544b99675
filename: s41467-023-39855-x.pdf