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Article: Atomically Thin CrCl3: An In-Plane Layered Antiferromagnetic Insulator

TitleAtomically Thin CrCl3: An In-Plane Layered Antiferromagnetic Insulator
Authors
Keywords2D magnetic insulator
in-plane layered antiferromagnetism
magnetic tunnel junction
weak magnetic anisotropy
magnetic phase transition
Issue Date2019
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/nanolett
Citation
Nano Letters, 2019, v. 19 n. 6, p. 3993-3998 How to Cite?
AbstractThe recent discovery of magnetism in atomically thin layers of van der Waals (vdW) crystals has created new opportunities for exploring magnetic phenomena in the two-dimensional (2D) limit. In most 2D magnets studied to date, the c-axis is an easy axis, so that at zero applied field the polarization of each layer is perpendicular to the plane. Here, we demonstrate that atomically thin CrCl3 is a layered antiferromagnetic insulator with an easy-plane normal to the c-axis, that is, the polarization is in the plane of each layer and has no preferred direction within it. Ligand-field photoluminescence at 870 nm is observed down to the monolayer limit, demonstrating its insulating properties. We investigate the in-plane magnetic order using tunneling magnetoresistance in graphene/CrCl3/graphene tunnel junctions, establishing that the interlayer coupling is antiferromagnetic down to the bilayer. From the temperature dependence of the magnetoresistance, we obtain an effective magnetic phase diagram for the bilayer. Our result shows that CrCl3 should be useful for studying the physics of 2D phase transitions and for making new kinds of vdW spintronic devices.
Persistent Identifierhttp://hdl.handle.net/10722/272302
ISSN
2017 Impact Factor: 12.08
2015 SCImago Journal Rankings: 9.006

 

DC FieldValueLanguage
dc.contributor.authorCai, X-
dc.contributor.authorSong, T-
dc.contributor.authorWilson, NP-
dc.contributor.authorClark, G-
dc.contributor.authorHe, M-
dc.contributor.authorZhang, X-
dc.contributor.authorTaniguchi, T-
dc.contributor.authorWatanabe, K-
dc.contributor.authorYao, W-
dc.contributor.authorXiao, D-
dc.contributor.authorMcGuire, MA-
dc.contributor.authorCobden, DH-
dc.contributor.authorXu, X-
dc.date.accessioned2019-07-20T10:39:36Z-
dc.date.available2019-07-20T10:39:36Z-
dc.date.issued2019-
dc.identifier.citationNano Letters, 2019, v. 19 n. 6, p. 3993-3998-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10722/272302-
dc.description.abstractThe recent discovery of magnetism in atomically thin layers of van der Waals (vdW) crystals has created new opportunities for exploring magnetic phenomena in the two-dimensional (2D) limit. In most 2D magnets studied to date, the c-axis is an easy axis, so that at zero applied field the polarization of each layer is perpendicular to the plane. Here, we demonstrate that atomically thin CrCl3 is a layered antiferromagnetic insulator with an easy-plane normal to the c-axis, that is, the polarization is in the plane of each layer and has no preferred direction within it. Ligand-field photoluminescence at 870 nm is observed down to the monolayer limit, demonstrating its insulating properties. We investigate the in-plane magnetic order using tunneling magnetoresistance in graphene/CrCl3/graphene tunnel junctions, establishing that the interlayer coupling is antiferromagnetic down to the bilayer. From the temperature dependence of the magnetoresistance, we obtain an effective magnetic phase diagram for the bilayer. Our result shows that CrCl3 should be useful for studying the physics of 2D phase transitions and for making new kinds of vdW spintronic devices.-
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 [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subject2D magnetic insulator-
dc.subjectin-plane layered antiferromagnetism-
dc.subjectmagnetic tunnel junction-
dc.subjectweak magnetic anisotropy-
dc.subjectmagnetic phase transition-
dc.titleAtomically Thin CrCl3: An In-Plane Layered Antiferromagnetic Insulator-
dc.typeArticle-
dc.identifier.emailYao, W: wangyao@hku.hk-
dc.identifier.authorityYao, W=rp00827-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.nanolett.9b01317-
dc.identifier.pmid31083954-
dc.identifier.scopuseid_2-s2.0-85067366354-
dc.identifier.hkuros298575-
dc.identifier.volume19-
dc.identifier.issue6-
dc.identifier.spage3993-
dc.identifier.epage3998-
dc.publisher.placeUnited States-

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