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dc.contributor.authorEads, Calley N.
dc.contributor.authorBandak, Dmytro
dc.contributor.authorNeupane, Mahesh R.
dc.contributor.authorNordlund, Dennis
dc.contributor.authorMonti, Oliver L. A.
dc.date.accessioned2017-12-05T15:59:51Z
dc.date.available2017-12-05T15:59:51Z
dc.date.issued2017-11-08
dc.identifier.citationAnisotropic attosecond charge carrier dynamics and layer decoupling in quasi-2D layered SnS2 2017, 8 (1) Nature Communicationsen
dc.identifier.issn2041-1723
dc.identifier.pmid29118395
dc.identifier.doi10.1038/s41467-017-01522-3
dc.identifier.urihttp://hdl.handle.net/10150/626188
dc.description.abstractStrong quantum confinement effects lead to striking new physics in two-dimensional materials such as graphene or transition metal dichalcogenides. While spectroscopic fingerprints of such quantum confinement have been demonstrated widely, the consequences for carrier dynamics are at present less clear, particularly on ultrafast timescales. This is important for tailoring, probing, and understanding spin and electron dynamics in layered and two-dimensional materials even in cases where the desired bandgap engineering has been achieved. Here we show by means of core-hole clock spectroscopy that SnS2 exhibits spin-dependent attosecond charge delocalization times (tau(deloc)) for carriers confined within a layer, tau(deloc) < 400 as, whereas interlayer charge delocalization is dynamically quenched in excess of a factor of 10, tau(deloc) > 2.7 fs. These layer decoupling dynamics are a direct consequence of strongly anisotropic screening established within attoseconds, and demonstrate that important two-dimensional characteristics are also present in bulk crystals of van der Waals-layered materials, at least on ultrafast timescales.
dc.description.sponsorshipNational Science Foundation [CHE 1213243, CHE 1565497]; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]en
dc.language.isoenen
dc.publisherNATURE PUBLISHING GROUPen
dc.relation.urlhttp://www.nature.com/articles/s41467-017-01522-3en
dc.rights© The Author(s) 2017. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.en
dc.titleAnisotropic attosecond charge carrier dynamics and layer decoupling in quasi-2D layered SnS2en
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Dept Chem & Biochemen
dc.contributor.departmentUniv Arizona, Dept Physen
dc.identifier.journalNature Communicationsen
dc.description.noteUA Open Access Publishing Fund.
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-06-06T08:08:27Z
html.description.abstractStrong quantum confinement effects lead to striking new physics in two-dimensional materials such as graphene or transition metal dichalcogenides. While spectroscopic fingerprints of such quantum confinement have been demonstrated widely, the consequences for carrier dynamics are at present less clear, particularly on ultrafast timescales. This is important for tailoring, probing, and understanding spin and electron dynamics in layered and two-dimensional materials even in cases where the desired bandgap engineering has been achieved. Here we show by means of core-hole clock spectroscopy that SnS2 exhibits spin-dependent attosecond charge delocalization times (tau(deloc)) for carriers confined within a layer, tau(deloc) < 400 as, whereas interlayer charge delocalization is dynamically quenched in excess of a factor of 10, tau(deloc) > 2.7 fs. These layer decoupling dynamics are a direct consequence of strongly anisotropic screening established within attoseconds, and demonstrate that important two-dimensional characteristics are also present in bulk crystals of van der Waals-layered materials, at least on ultrafast timescales.


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