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Article: Observation of strong excitonic magneto-chiral anisotropy in twisted bilayer van der Waals crystals

TitleObservation of strong excitonic magneto-chiral anisotropy in twisted bilayer van der Waals crystals
Authors
Issue Date2021
PublisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html
Citation
Nature Communications, 2021, v. 12 n. 1, p. article no. 2088 How to Cite?
AbstractThe interplay between chirality and magnetism generates a distinct physical process, the magneto-chiral effect, which enables one to develop functionalities that cannot be achieved solely by any of the two. Such a process is universal with the breaking of parity-inversion and time-reversal symmetry simultaneously. However, the magneto-chiral effect observed so far is weak when the matter responds to photons, electrons, or phonons. Here we report the first observation of strong magneto-chiral response to excitons in a twisted bilayer tungsten disulfide with the amplitude of excitonic magneto-chiral (ExMCh) anisotropy reaches a value of ~4%. We further found the ExMCh anisotropy features with a spectral splitting of ~7 nm, precisely the full-width at half maximum of the excitonic chirality spectrum. Without an externally applied strong magnetic field, the observed ExMCh effect with a spontaneous magnetic moment from the ferromagnetic substrate of thulium iron garnet at room temperature is favorable for device applications. The unique ExMCh processes provide a new pathway to actively control magneto-chiral applications in photochemical reactions, asymmetric synthesis, and drug delivery.
Persistent Identifierhttp://hdl.handle.net/10722/307747
ISSN
2020 Impact Factor: 14.919
2020 SCImago Journal Rankings: 5.559
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLan, S-
dc.contributor.authorLiu, X-
dc.contributor.authorWang, S-
dc.contributor.authorZhu, H-
dc.contributor.authorLiu, Y-
dc.contributor.authorGong, C-
dc.contributor.authorYang, S-
dc.contributor.authorShi, J-
dc.contributor.authorWang, Y-
dc.contributor.authorZhang, X-
dc.date.accessioned2021-11-12T13:37:14Z-
dc.date.available2021-11-12T13:37:14Z-
dc.date.issued2021-
dc.identifier.citationNature Communications, 2021, v. 12 n. 1, p. article no. 2088-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/307747-
dc.description.abstractThe interplay between chirality and magnetism generates a distinct physical process, the magneto-chiral effect, which enables one to develop functionalities that cannot be achieved solely by any of the two. Such a process is universal with the breaking of parity-inversion and time-reversal symmetry simultaneously. However, the magneto-chiral effect observed so far is weak when the matter responds to photons, electrons, or phonons. Here we report the first observation of strong magneto-chiral response to excitons in a twisted bilayer tungsten disulfide with the amplitude of excitonic magneto-chiral (ExMCh) anisotropy reaches a value of ~4%. We further found the ExMCh anisotropy features with a spectral splitting of ~7 nm, precisely the full-width at half maximum of the excitonic chirality spectrum. Without an externally applied strong magnetic field, the observed ExMCh effect with a spontaneous magnetic moment from the ferromagnetic substrate of thulium iron garnet at room temperature is favorable for device applications. The unique ExMCh processes provide a new pathway to actively control magneto-chiral applications in photochemical reactions, asymmetric synthesis, and drug delivery.-
dc.languageeng-
dc.publisherNature Research: Fully open access journals. The Journal's web site is located at http://www.nature.com/ncomms/index.html-
dc.relation.ispartofNature Communications-
dc.rightsNature Communications. Copyright © Nature Research: Fully open access journals.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleObservation of strong excitonic magneto-chiral anisotropy in twisted bilayer van der Waals crystals-
dc.typeArticle-
dc.identifier.emailZhang, X: president@hku.hk-
dc.identifier.authorityZhang, X=rp02411-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-021-22412-9-
dc.identifier.pmid33828083-
dc.identifier.pmcidPMC8027870-
dc.identifier.scopuseid_2-s2.0-85103996579-
dc.identifier.hkuros329922-
dc.identifier.volume12-
dc.identifier.issue1-
dc.identifier.spagearticle no. 2088-
dc.identifier.epagearticle no. 2088-
dc.identifier.isiWOS:000638230300003-
dc.publisher.placeUnited Kingdom-

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