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Article: Layer-resolved magnetic proximity effect in van der Waals heterostructures

TitleLayer-resolved magnetic proximity effect in van der Waals heterostructures
Authors
Issue Date2020
PublisherNature Publishing Group.
Citation
Nature Nanotechnology, 2020, Epub 2020-01-27, p. 1-6 How to Cite?
AbstractMagnetic proximity effects are integral to manipulating spintronic1,2, superconducting3,4, excitonic5 and topological phenomena6,7,8 in heterostructures. These effects are highly sensitive to the interfacial electronic properties, such as electron wavefunction overlap and band alignment. The recent emergence of magnetic two-dimensional materials opens new possibilities for exploring proximity effects in van der Waals heterostructures9,10,11,12. In particular, atomically thin CrI3 exhibits layered antiferromagnetism, in which adjacent ferromagnetic monolayers are antiferromagnetically coupled9. Here we report a layer-resolved magnetic proximity effect in heterostructures formed by monolayer WSe2 and bi/trilayer CrI3. By controlling the individual layer magnetization in CrI3 with a magnetic field, we show that the spin-dependent charge transfer between WSe2 and CrI3 is dominated by the interfacial CrI3 layer, while the proximity exchange field is highly sensitive to the layered magnetic structure as a whole. In combination with reflective magnetic circular dichroism measurements, these properties allow the use of monolayer WSe2 as a spatially sensitive magnetic sensor to map out layered antiferromagnetic domain structures at zero magnetic field as well as antiferromagnetic/ferromagnetic domains at finite magnetic fields. Our work reveals a way to control proximity effects and probe interfacial magnetic order via van der Waals engineering13.
Persistent Identifierhttp://hdl.handle.net/10722/281170
ISSN
2019 Impact Factor: 31.538
2015 SCImago Journal Rankings: 19.832

 

DC FieldValueLanguage
dc.contributor.authorZhong, D-
dc.contributor.authorSeyler, KL-
dc.contributor.authorLinpeng, X-Y-
dc.contributor.authorWilson, NP-
dc.contributor.authorTaniguchi, T-
dc.contributor.authorWatanabe, K-
dc.contributor.authorMcGuire, MA-
dc.contributor.authorFu, K-MC-
dc.contributor.authorXiao, D-
dc.contributor.authorYao, W-
dc.contributor.authorXu, X-D-
dc.date.accessioned2020-03-09T09:51:07Z-
dc.date.available2020-03-09T09:51:07Z-
dc.date.issued2020-
dc.identifier.citationNature Nanotechnology, 2020, Epub 2020-01-27, p. 1-6-
dc.identifier.issn1748-3387-
dc.identifier.urihttp://hdl.handle.net/10722/281170-
dc.description.abstractMagnetic proximity effects are integral to manipulating spintronic1,2, superconducting3,4, excitonic5 and topological phenomena6,7,8 in heterostructures. These effects are highly sensitive to the interfacial electronic properties, such as electron wavefunction overlap and band alignment. The recent emergence of magnetic two-dimensional materials opens new possibilities for exploring proximity effects in van der Waals heterostructures9,10,11,12. In particular, atomically thin CrI3 exhibits layered antiferromagnetism, in which adjacent ferromagnetic monolayers are antiferromagnetically coupled9. Here we report a layer-resolved magnetic proximity effect in heterostructures formed by monolayer WSe2 and bi/trilayer CrI3. By controlling the individual layer magnetization in CrI3 with a magnetic field, we show that the spin-dependent charge transfer between WSe2 and CrI3 is dominated by the interfacial CrI3 layer, while the proximity exchange field is highly sensitive to the layered magnetic structure as a whole. In combination with reflective magnetic circular dichroism measurements, these properties allow the use of monolayer WSe2 as a spatially sensitive magnetic sensor to map out layered antiferromagnetic domain structures at zero magnetic field as well as antiferromagnetic/ferromagnetic domains at finite magnetic fields. Our work reveals a way to control proximity effects and probe interfacial magnetic order via van der Waals engineering13.-
dc.languageeng-
dc.publisherNature Publishing Group.-
dc.relation.ispartofNature Nanotechnology-
dc.rightsThis is a post-peer-review, pre-copyedit version of an article published in [insert journal title]. The final authenticated version is available online at: https://doi.org/[insert DOI]-
dc.titleLayer-resolved magnetic proximity effect in van der Waals heterostructures-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1038/s41565-019-0629-1-
dc.identifier.pmid31988503-
dc.identifier.scopuseid_2-s2.0-85078448024-
dc.identifier.hkuros309262-
dc.identifier.volumeEpub 2020-01-27-
dc.identifier.spage1-
dc.identifier.epage6-
dc.publisher.placeUnited Kingdom-

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