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Article: Skyrmions in the Moiré of van der Waals 2D Magnets

TitleSkyrmions in the Moiré of van der Waals 2D Magnets
Authors
Keywords2D magnets
Magnetic skyrmions
Moiré pattern
Spintronics
Van der Waals heterostructure
Issue Date2018
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2018, v. 18 n. 11, p. 7194-7199 How to Cite?
AbstractWe explore the skyrmion formation and control possibilities in two-dimensional (2D) magnets from the ubiquitous moiré pattern in vdW heterostructures. Using the example of a ferromagnetic monolayer on an antiferromagnetic substrate, we demonstrate a new origin of skyrmions in the 2D magnets from the lateral modulation of interlayer magnetic coupling by the locally different atomic registries in moiré. The moiré skyrmions are doubly degenerate with opposite topological charge and trapped at an ordered array of sites with the moiré periodicity that can be dramatically tuned by strain and interlayer translation. At relatively strong interlayer coupling, the ground states are skyrmion lattices, where magnetic field can switch the skyrmion vorticity and location in the moiré. At weak interlayer coupling limit, we find metastable skyrmion excitations on the ferromagnetic ground state that can be deterministically moved between the ordered moiré trapping sites by current pulses. Our results point to potential uses of moiré skyrmions both as information carriers and as drastically tunable topological background of electron transport.
Persistent Identifierhttp://hdl.handle.net/10722/266043
ISSN
2020 Impact Factor: 11.189
2015 SCImago Journal Rankings: 9.006
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTong, Q-
dc.contributor.authorLiu, F-
dc.contributor.authorXiao, J-
dc.contributor.authorYao, W-
dc.date.accessioned2018-12-17T02:16:37Z-
dc.date.available2018-12-17T02:16:37Z-
dc.date.issued2018-
dc.identifier.citationNano Letters, 2018, v. 18 n. 11, p. 7194-7199-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10722/266043-
dc.description.abstractWe explore the skyrmion formation and control possibilities in two-dimensional (2D) magnets from the ubiquitous moiré pattern in vdW heterostructures. Using the example of a ferromagnetic monolayer on an antiferromagnetic substrate, we demonstrate a new origin of skyrmions in the 2D magnets from the lateral modulation of interlayer magnetic coupling by the locally different atomic registries in moiré. The moiré skyrmions are doubly degenerate with opposite topological charge and trapped at an ordered array of sites with the moiré periodicity that can be dramatically tuned by strain and interlayer translation. At relatively strong interlayer coupling, the ground states are skyrmion lattices, where magnetic field can switch the skyrmion vorticity and location in the moiré. At weak interlayer coupling limit, we find metastable skyrmion excitations on the ferromagnetic ground state that can be deterministically moved between the ordered moiré trapping sites by current pulses. Our results point to potential uses of moiré skyrmions both as information carriers and as drastically tunable topological background of electron transport.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett-
dc.relation.ispartofNano Letters-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.nanolett.8b03315-
dc.subject2D magnets-
dc.subjectMagnetic skyrmions-
dc.subjectMoiré pattern-
dc.subjectSpintronics-
dc.subjectVan der Waals heterostructure-
dc.titleSkyrmions in the Moiré of van der Waals 2D Magnets-
dc.typeArticle-
dc.identifier.emailTong, Q: tongqj@hku.hk-
dc.identifier.emailLiu, F: feiliu@hku.hk-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityLiu, F=rp02229-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.nanolett.8b03315-
dc.identifier.pmid30285450-
dc.identifier.scopuseid_2-s2.0-85054688805-
dc.identifier.hkuros296395-
dc.identifier.volume18-
dc.identifier.issue11-
dc.identifier.spage7194-
dc.identifier.epage7199-
dc.identifier.isiWOS:000451102100072-
dc.publisher.placeUnited States-
dc.identifier.issnl1530-6984-

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