# Thermal relaxation of strain and twist in ferroelectric hexagonal boron nitride moiré interfaces

https://mdr.nims.go.jp/datasets/b928c050-57c9-42bf-8e43-3ba76662d098

## File

- [024303_1_5.0210112.pdf](https://mdr.nims.go.jp/filesets/54b82d10-8172-4cec-ba1a-8fb5dcb42130/download) ([Detail](https://mdr.nims.go.jp/filesets/54b82d10-8172-4cec-ba1a-8fb5dcb42130.md))

## Id

b928c050-57c9-42bf-8e43-3ba76662d098

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T07:08:15.530175Z

## Updated at

2025-02-06T03:30:56.825889Z

## Published at

2025-02-06T03:30:56.897090Z

## Doi



## First published url

https://doi.org/10.1063/5.0210112

## Date published

2024-07-14

## Recorded date published

2024-7-14

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Thermal relaxation of strain and twist in ferroelectric hexagonal boron nitride
    moiré interfaces
  title_type: original
  lang: en

## Description

- description: New properties can arise at van der Waals (vdW) interfaces hosting
    a moiré pattern generated by interlayer twist and strain. However, achieving precise
    control of interlayer twist/strain remains an ongoing challenge in vdW heterostructure
    assembly, and even subtle variation in these structural parameters can create
    significant changes in the moiré period and emergent properties. Characterizing
    the rate of interlayer twist/strain relaxation during thermal annealing is critical
    to establish a thermal budget for vdW heterostructure construction and may provide
    a route to improve the homogeneity of the interface or to control its final state.
    Here, we characterize the spatial and temporal dependence of interfacial twist
    and strain relaxation in marginally-twisted hBN/hBN interfaces heated under conditions
    relevant to vdW heterostructure assembly and typical sample annealing. We find
    that the ferroelectric hBN/hBN moiré relaxes minimally during annealing in air
    at typical assembly temperatures of 170oC. However, at 400°C, twist angle relaxes
    significantly, accompanied by a decrease in spatial uniformity. Uniaxial heterostrain
    initially increases and then decreases over time, becoming increasingly non-uniform
    in direction. Structural irregularities such as step edges, contamination bubbles,
    or contact with the underlying substrate result in local inhomogeneity in the
    rate of relaxation
  description_type: abstract
  lang: und

## Creator

- name: Marisa Hocking
  role: author
  orcid: https://orcid.org/0000-0002-5884-7832
- name: Christina E. Henzinger
  role: author
  orcid: https://orcid.org/0009-0004-5993-8754
- name: Steven J. Tran
  role: author
  orcid: https://orcid.org/0000-0002-9660-2377
- name: Mihir Pendharkar
  role: author
  orcid: https://orcid.org/0000-0003-1857-6131
- name: Nathan J. Bittner
  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: David Goldhaber-Gordon
  role: author
  orcid: https://orcid.org/0000-0001-8549-0560
- name: Andrew J. Mannix
  role: author
  orcid: https://orcid.org/0000-0003-4788-1506

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: van der Waals interfaces
  schema: not_defined
- subject: moiré pattern
  schema: not_defined
- subject: thermal annealing
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Journal of Applied Physics
  issn: '00218979'
  volume: '136'
  issue: '2'

## Conference



## Related item



## Funding

- identifier: DE-AC02-76SF00515
  funder_name: U.S. Department of Energy
- identifier: DE-SC0021984
  funder_name: U.S. Department of Energy
- identifier: DMR- 2018008
  funder_name: National Science Foundation
- identifier: ECCS-2026822
  funder_name: National Science Foundation
- identifier: ECCS-1542152
  funder_name: National Science Foundation
- identifier: Q-BALMS LDRD
  funder_name: SLAC National Accelerator Laboratory
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  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



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## Custom property



## Fileset

- id: 54b82d10-8172-4cec-ba1a-8fb5dcb42130
  filename: 024303_1_5.0210112.pdf
  content_type: application/pdf
  size: 6272161
  md5: 6e4878c46b23f5e210a3168860cd1700

## Thumbnail

fileset_id: 54b82d10-8172-4cec-ba1a-8fb5dcb42130
filename: 024303_1_5.0210112.pdf