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Article: Magnetic Proximity Effect in a van der Waals Moiré Superlattice

TitleMagnetic Proximity Effect in a van der Waals Moiré Superlattice
Authors
KeywordsMagnetic coupling
Proximity effect
Spintronics
Surface & interfacial phenomena
Valleytronics
Issue Date2019
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prapplied/staff#board
Citation
Physical Review Applied, 2019, v. 12 n. 2, p. article no. 024031 How to Cite?
AbstractWe investigate the magnetic proximity effect in a van der Waals heterostructure formed by a monolayer semiconductor stacked on a two-dimensional (2D) ferromagnet, where the lattice mismatch and twisting between the layers typically lead to the formation of a moiré pattern. We find that the magnetic proximity effect arising from the spin-dependent interlayer coupling depends sensitively on the interlayer atomic registry. Consequently, in the moiré pattern, the spatial variation of the atomic registry leads to a lateral modulation of a magnetic proximity field. Such a moiré modulated magnetic proximity effect manifests as a miniband spin splitting that strongly depends on the moiré periodicity, which can be mechanically tuned by a relative twisting and/or strain between the layers. We also show, because of the moiré modulation on the interlayer distance, a perpendicular electric field can be used to control the miniband spin splitting. Our results suggest potential nanodevices where the moiré modulated magnetic proximity effect can lead to unique spin controllability.
Persistent Identifierhttp://hdl.handle.net/10722/275144
ISSN
2019 Impact Factor: 4.194

 

DC FieldValueLanguage
dc.contributor.authorTong, Q-
dc.contributor.authorChen, M-
dc.contributor.authorYao, W-
dc.date.accessioned2019-09-10T02:36:26Z-
dc.date.available2019-09-10T02:36:26Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review Applied, 2019, v. 12 n. 2, p. article no. 024031-
dc.identifier.issn2331-7019-
dc.identifier.urihttp://hdl.handle.net/10722/275144-
dc.description.abstractWe investigate the magnetic proximity effect in a van der Waals heterostructure formed by a monolayer semiconductor stacked on a two-dimensional (2D) ferromagnet, where the lattice mismatch and twisting between the layers typically lead to the formation of a moiré pattern. We find that the magnetic proximity effect arising from the spin-dependent interlayer coupling depends sensitively on the interlayer atomic registry. Consequently, in the moiré pattern, the spatial variation of the atomic registry leads to a lateral modulation of a magnetic proximity field. Such a moiré modulated magnetic proximity effect manifests as a miniband spin splitting that strongly depends on the moiré periodicity, which can be mechanically tuned by a relative twisting and/or strain between the layers. We also show, because of the moiré modulation on the interlayer distance, a perpendicular electric field can be used to control the miniband spin splitting. Our results suggest potential nanodevices where the moiré modulated magnetic proximity effect can lead to unique spin controllability.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prapplied/staff#board-
dc.relation.ispartofPhysical Review Applied-
dc.rightsPhysical Review Applied. Copyright © American Physical Society.-
dc.rightsCopyright [2019] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevApplied.12.024031].-
dc.subjectMagnetic coupling-
dc.subjectProximity effect-
dc.subjectSpintronics-
dc.subjectSurface & interfacial phenomena-
dc.subjectValleytronics-
dc.titleMagnetic Proximity Effect in a van der Waals Moiré Superlattice-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevApplied.12.024031-
dc.identifier.scopuseid_2-s2.0-85072035241-
dc.identifier.hkuros304322-
dc.identifier.volume12-
dc.identifier.issue2-
dc.identifier.spagearticle no. 024031-
dc.identifier.epagearticle no. 024031-
dc.publisher.placeUnited States-

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