Electrically tunable stacking domains and ferroelectricity in moiré superlattices
Citation
Bennett, D., & Remez, B. Electrically tunable stacking domains and ferroelectricity in moiré
superlattices. https://doi.org/10.17863/CAM.78721
Abstract
It is well known that stacking domains form in moir\'e superlattices due to
the competition between the interlayer van der Waals forces and intralayer
elastic forces, which can be recognized as polar domains due to the local
spontaneous polarization in bilayers without centrosymmetry. We propose a
theoretical model which captures the effect of an applied electric field on the
domain structure. The coupling between the spontaneous polarization and field
leads to uneven relaxation of the domains, and a net polarization in the
superlattice at nonzero fields, which is sensitive to the moir\'e period. We
show that the dielectric response to the field reduces the stacking energy and
leads to softer domains in all bilayers. We then discuss the recent
observations of ferroelectricity in the context of our model.
Keywords
cond-mat.mes-hall, cond-mat.mes-hall
Identifiers
This record's DOI: https://doi.org/10.17863/CAM.78721
This record's URL: https://www.repository.cam.ac.uk/handle/1810/331274
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.
Recommended or similar items
The current recommendation prototype on the Apollo Repository will be turned off on 03 February 2023. Although the pilot has been fruitful for both parties, the service provider IKVA is focusing on horizon scanning products and so the recommender service can no longer be supported. We recognise the importance of recommender services in supporting research discovery and are evaluating offerings from other service providers. If you would like to offer feedback on this decision please contact us on: support@repository.cam.ac.uk