DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Jekwan | - |
dc.contributor.author | Sim, Sangwan | - |
dc.contributor.author | Park, Soohyun | - |
dc.contributor.author | In, Chihun | - |
dc.contributor.author | Cho, Seungwan | - |
dc.contributor.author | Lee, Seungmin | - |
dc.contributor.author | Cha, Soonyoung | - |
dc.contributor.author | Lee, Sooun | - |
dc.contributor.author | HOIL, KIM | - |
dc.contributor.author | Kim, Jehyun | - |
dc.contributor.author | Shim, Wooyoung | - |
dc.contributor.author | Kim, Jun Sung | - |
dc.contributor.author | Kim, Dohun | - |
dc.contributor.author | Choi, Hyunyong | - |
dc.date.accessioned | 2019-04-07T16:54:49Z | - |
dc.date.available | 2019-04-07T16:54:49Z | - |
dc.date.created | 2018-09-18 | - |
dc.date.issued | 2018-08 | - |
dc.identifier.issn | 2330-4022 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/95702 | - |
dc.description.abstract | The nature of spin transport in the bulk and side surface of three-dimensional topological insulator thin film geometry is a relatively unexplored subject, compared to the extensively studied top and bottom surface states. Here we employ time-and space-resolved helicity-dependent photocurrent measurements to investigate the effect of optically excited bulk carriers on the spin-polarized topological side surface conduction. Time-resolved femtosecond double-pulse excitation reveals that the spin current toward the side surface arises from the bulk-originated spin Hall effect (SHE), whose microscopic origin is governed by an Elliott Yafet-type spin relaxation mechanism via an extrinsic side jump process. Bias-and temperature-dependent measurements further confirm that the spin scattering in Bi2Se3 has multiple sources including impurity and electron phonon scattering. The SHE-assisted side surface spin conduction shows an exceptionally high charge-to-spin conversion efficiency of 35% at 77 K, which may offer new spintronic applications of topological insulators such as spin orbit torque or spin-flip controlled light-emitting devices. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | ACS PHOTONICS | - |
dc.title | Role of Spin Hall Effect in the Topological Side Surface Conduction | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsphotonics.8b00592 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS PHOTONICS, v.5, no.8, pp.3347 - 3352 | - |
dc.identifier.wosid | 000442185900048 | - |
dc.citation.endPage | 3352 | - |
dc.citation.number | 8 | - |
dc.citation.startPage | 3347 | - |
dc.citation.title | ACS PHOTONICS | - |
dc.citation.volume | 5 | - |
dc.contributor.affiliatedAuthor | HOIL, KIM | - |
dc.contributor.affiliatedAuthor | Kim, Jun Sung | - |
dc.identifier.scopusid | 2-s2.0-85050800868 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | INSULATOR | - |
dc.subject.keywordPlus | BI2SE3 | - |
dc.subject.keywordPlus | POLARIZATION | - |
dc.subject.keywordPlus | GENERATION | - |
dc.subject.keywordPlus | BI2TE2SE | - |
dc.subject.keywordAuthor | topological insulators | - |
dc.subject.keywordAuthor | spin relaxation | - |
dc.subject.keywordAuthor | spin Hall effect | - |
dc.subject.keywordAuthor | photocurrent | - |
dc.subject.keywordAuthor | ultrafast | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Optics | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Optics | - |
dc.relation.journalResearchArea | Physics | - |
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