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dc.contributor.authorBennett, D
dc.contributor.authorRemez, B
dc.date.accessioned2022-01-28T16:34:11Z
dc.date.available2022-01-28T16:34:11Z
dc.date.issued2022
dc.date.submitted2021-08-24
dc.identifier.issn2397-7132
dc.identifier.others41699-021-00281-6
dc.identifier.other281
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/333140
dc.descriptionFunder: Cambridge Commonwealth, European and International Trust (Cambridge Commonwealth, European & International Trust); doi: https://doi.org/10.13039/501100003343
dc.description.abstractIt 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.
dc.description.sponsorshipD. B would like to thank E. Artacho and I. Lebedeva for helpful discussions. D. B acknowledges funding from the EPSRC Centre for Doctoral Training in Computational Methods for Materials Science under grant number EP/L015552/1. B. R gratefully acknowledges support from the Cambridge International Trust.
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.subjectArticle
dc.subject/639/766/119/996
dc.subject/639/301/357/1018
dc.subject/639/301/1034/1038
dc.subjectarticle
dc.titleOn electrically tunable stacking domains and ferroelectricity in moiré superlattices
dc.typeArticle
dc.date.updated2022-01-28T16:34:10Z
prism.issueIdentifier1
prism.publicationNamenpj 2D Materials and Applications
prism.volume6
dc.identifier.doi10.17863/CAM.80563
dcterms.dateAccepted2021-12-01
rioxxterms.versionofrecord10.1038/s41699-021-00281-6
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidBennett, D [0000-0003-0892-2125]
dc.contributor.orcidRemez, B [0000-0002-8108-5303]
dc.identifier.eissn2397-7132
pubs.funder-project-idEPSRC (1948657)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L015552/1)
cam.issuedOnline2022-01-17


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