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Enhanced Spin-to-Charge Conversion Efficiency in Ultrathin Bi2Se3Observed by Spintronic Terahertz Spectroscopy

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dc.contributor.authorPark, Hanbum-
dc.contributor.authorJeong, Kwangsik-
dc.contributor.authorMaeng, Inhee-
dc.contributor.authorKyung Ik Sim-
dc.contributor.authorPathak, Sachin-
dc.contributor.authorKim, Jonghoon-
dc.contributor.authorHong, Seok-Bo-
dc.contributor.authorJung, Taek Sun-
dc.contributor.authorKang, Chul-
dc.contributor.authorKim, Jae Hoon-
dc.contributor.authorHong, Jongill-
dc.contributor.authorCho, Mann-Ho-
dc.date.accessioned2021-07-12T05:30:16Z-
dc.date.accessioned2021-07-12T05:30:16Z-
dc.date.available2021-07-12T05:30:16Z-
dc.date.available2021-07-12T05:30:16Z-
dc.date.created2021-07-07-
dc.date.issued2021-05-
dc.identifier.issn1944-8244-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/9920-
dc.description.abstract© 2021 American Chemical Society.Owing to their remarkable spin-charge conversion (SCC) efficiency, topological insulators (TIs) are the most attractive candidates for spin-orbit torque generators. The simple method of enhancing SCC efficiency is to reduce the thickness of TI films to minimize the trivial bulk contribution. However, when the thickness reaches the ultrathin regime, the SCC efficiency decreases owing to intersurface hybridization. To overcome these contrary effects, we induced dehybridization of the ultrathin TI film by breaking the inversion symmetry between surfaces. For the TI film grown on an oxygen-deficient transition-metal oxide, the unbonded transition-metal d-orbitals affected only the bottom surface, resulting in asymmetric surface band structures. Spintronic terahertz emission spectroscopy, an emerging tool for investigating the SCC characteristics, revealed that the resulting SCC efficiency in symmetry-broken ultrathin Bi2Se3 was enhanced by up to ∼2.4 times.-
dc.description.uri1-
dc.language영어-
dc.publisherAmerican Chemical Society-
dc.titleEnhanced Spin-to-Charge Conversion Efficiency in Ultrathin Bi2Se3Observed by Spintronic Terahertz Spectroscopy-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000655027500105-
dc.identifier.scopusid2-s2.0-85106354441-
dc.identifier.rimsid75974-
dc.contributor.affiliatedAuthorKyung Ik Sim-
dc.identifier.doi10.1021/acsami.1c03168-
dc.identifier.bibliographicCitationACS Applied Materials and Interfaces, v.13, no.19, pp.23153 - 23160-
dc.citation.titleACS Applied Materials and Interfaces-
dc.citation.volume13-
dc.citation.number19-
dc.citation.startPage23153-
dc.citation.endPage23160-
dc.description.journalClass1-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalWebOfScienceCategoryNanoscience & Nanotechnology-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.subject.keywordPlusORBIT TORQUE-
dc.subject.keywordPlusELECTRICAL DETECTION-
dc.subject.keywordAuthorspin-charge conversion-
dc.subject.keywordAuthorsurface hybridization-
dc.subject.keywordAuthorterahertz emission-
dc.subject.keywordAuthortopological insulator-
dc.subject.keywordAuthortransition-metal oxide-
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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