File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Interlayer engineering of Fe3GeTe2: From 3D superlattice to 2D monolayer

TitleInterlayer engineering of Fe3GeTe2: From 3D superlattice to 2D monolayer
Authors
Keywordsexfoliation
intercalation
van der Waals magnet
Issue Date2024
Citation
Proceedings of the National Academy of Sciences of the United States of America, 2024, v. 121, n. 4, article no. e2314454121 How to Cite?
AbstractThe discoveries of ferromagnetism down to the atomically thin limit in van der Waals (vdW) crystals by mechanical exfoliation have enriched the family of magnetic thin films [C. Gong et al., Nature 546, 265-269 (2017) and B. Huang et al., Nature 546, 270-273 (2017)]. However, compared to the study of traditional magnetic thin films by physical deposition methods, the toolbox of the vdW crystals based on mechanical exfoliation and transfer suffers from low yield and ambient corrosion problem and now is facing new challenges to study magnetism. For example, the formation of magnetic superlattice is difficult in vdW crystals, which limits the study of the interlayer interaction in vdW crystals [M. Gibertini, M. Koperski, A. F. Morpurgo, K. S. Novoselov, Nat. Nanotechnol. 14, 408-419 (2019)]. Here, we report a strategy of interlayer engineering of the magnetic vdW crystal Fe3GeTe2 (FGT) by intercalating quaternary ammonium cations into the vdW spacing. Both three-dimensional (3D) vdW superlattice and two-dimensional (2D) vdW monolayer can be formed by using this method based on the amount of intercalant. On the one hand, the FGT superlattice shows a strong 3D critical behavior with a decreased coercivity and increased domain wall size, attributed to the co-engineering of the anisotropy, exchange interaction, and electron doping by intercalation. On the other hand, the 2D vdW few layers obtained by over-intercalation are capped with organic molecules from the bulk crystal, which not only enhances the ferromagnetic transition temperature (TC), but also substantially protects the thin samples from degradation, thus allowing the preparation of large-scale FGT ink in ambient environment.
Persistent Identifierhttp://hdl.handle.net/10722/343647
ISSN
2023 Impact Factor: 9.4
2023 SCImago Journal Rankings: 3.737

 

DC FieldValueLanguage
dc.contributor.authorWu, Yecun-
dc.contributor.authorYang Wang, Bai-
dc.contributor.authorYu, Yijun-
dc.contributor.authorLi, Yanbin-
dc.contributor.authorRibeiro, Henrique B.-
dc.contributor.authorWang, Jierong-
dc.contributor.authorXu, Rong-
dc.contributor.authorLiu, Yunzhi-
dc.contributor.authorYe, Yusheng-
dc.contributor.authorZhou, Jiawei-
dc.contributor.authorKe, Feng-
dc.contributor.authorHarbola, Varun-
dc.contributor.authorHeinz, Tony F.-
dc.contributor.authorHwang, Harold Y.-
dc.contributor.authorCui, Yi-
dc.date.accessioned2024-05-27T09:28:55Z-
dc.date.available2024-05-27T09:28:55Z-
dc.date.issued2024-
dc.identifier.citationProceedings of the National Academy of Sciences of the United States of America, 2024, v. 121, n. 4, article no. e2314454121-
dc.identifier.issn0027-8424-
dc.identifier.urihttp://hdl.handle.net/10722/343647-
dc.description.abstractThe discoveries of ferromagnetism down to the atomically thin limit in van der Waals (vdW) crystals by mechanical exfoliation have enriched the family of magnetic thin films [C. Gong et al., Nature 546, 265-269 (2017) and B. Huang et al., Nature 546, 270-273 (2017)]. However, compared to the study of traditional magnetic thin films by physical deposition methods, the toolbox of the vdW crystals based on mechanical exfoliation and transfer suffers from low yield and ambient corrosion problem and now is facing new challenges to study magnetism. For example, the formation of magnetic superlattice is difficult in vdW crystals, which limits the study of the interlayer interaction in vdW crystals [M. Gibertini, M. Koperski, A. F. Morpurgo, K. S. Novoselov, Nat. Nanotechnol. 14, 408-419 (2019)]. Here, we report a strategy of interlayer engineering of the magnetic vdW crystal Fe3GeTe2 (FGT) by intercalating quaternary ammonium cations into the vdW spacing. Both three-dimensional (3D) vdW superlattice and two-dimensional (2D) vdW monolayer can be formed by using this method based on the amount of intercalant. On the one hand, the FGT superlattice shows a strong 3D critical behavior with a decreased coercivity and increased domain wall size, attributed to the co-engineering of the anisotropy, exchange interaction, and electron doping by intercalation. On the other hand, the 2D vdW few layers obtained by over-intercalation are capped with organic molecules from the bulk crystal, which not only enhances the ferromagnetic transition temperature (TC), but also substantially protects the thin samples from degradation, thus allowing the preparation of large-scale FGT ink in ambient environment.-
dc.languageeng-
dc.relation.ispartofProceedings of the National Academy of Sciences of the United States of America-
dc.subjectexfoliation-
dc.subjectintercalation-
dc.subjectvan der Waals magnet-
dc.titleInterlayer engineering of Fe3GeTe2: From 3D superlattice to 2D monolayer-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1073/pnas.2314454121-
dc.identifier.pmid38232283-
dc.identifier.scopuseid_2-s2.0-85182762186-
dc.identifier.volume121-
dc.identifier.issue4-
dc.identifier.spagearticle no. e2314454121-
dc.identifier.epagearticle no. e2314454121-
dc.identifier.eissn1091-6490-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats