Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41467-018-04939-6
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dc.titleDirect visualization of current-induced spin accumulation in topological insulators
dc.contributor.authorLiu Y.
dc.contributor.authorBesbas J.
dc.contributor.authorWang Y.
dc.contributor.authorHe P.
dc.contributor.authorChen M.
dc.contributor.authorZhu D.
dc.contributor.authorWu Y.
dc.contributor.authorLee J.M.
dc.contributor.authorWang L.
dc.contributor.authorMoon J.
dc.contributor.authorKoirala N.
dc.contributor.authorOh S.
dc.contributor.authorYang H.
dc.date.accessioned2019-03-21T08:30:43Z
dc.date.available2019-03-21T08:30:43Z
dc.date.issued2018
dc.identifier.citationLiu Y., Besbas J., Wang Y., He P., Chen M., Zhu D., Wu Y., Lee J.M., Wang L., Moon J., Koirala N., Oh S., Yang H. (2018). Direct visualization of current-induced spin accumulation in topological insulators. Nature Communications 9 (1) : 2492. ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-018-04939-6
dc.identifier.issn20411723
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/152522
dc.description.abstractCharge-to-spin conversion in various materials is the key for the fundamental understanding of spin-orbitronics and efficient magnetization manipulation. Here we report the direct spatial imaging of current-induced spin accumulation at the channel edges of Bi2Se3 and BiSbTeSe2 topological insulators as well as Pt by a scanning photovoltage microscope at room temperature. The spin polarization is along the out-of-plane direction with opposite signs for the two channel edges. The accumulated spin direction reverses sign upon changing the current direction and the detected spin signal shows a linear dependence on the magnitude of currents, indicating that our observed phenomena are current-induced effects. The spin Hall angle of Bi2Se3, BiSbTeSe2, and Pt is determined to be 0.0085, 0.0616, and 0.0085, respectively. Our results open up the possibility of optically detecting the current-induced spin accumulations, and thus point towards a better understanding of the interaction between spins and circularly polarized light. © 2018 The Author(s).
dc.publisherNature Publishing Group
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.description.doi10.1038/s41467-018-04939-6
dc.description.sourcetitleNature Communications
dc.description.volume9
dc.description.issue1
dc.description.page2492
dc.published.statepublished
dc.grant.idNRFCRP12-2013-01
dc.grant.idEFMA-1542798
dc.grant.idGBMF4418
dc.grant.idCE170100039
dc.grant.fundingagencyA*STAR’s Pharos Programme
dc.grant.fundingagencyNational Research Foundation (NRF)
dc.grant.fundingagencyNational Science Foundation
dc.grant.fundingagencyGordon and Betty Moore Foundation
dc.grant.fundingagencyAustralian Research Council Centre of Excellence
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