DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Jekwan | - |
dc.contributor.author | Heo, Wonhyeok | - |
dc.contributor.author | Cha, Myungjun | - |
dc.contributor.author | Watanabe, Kenji | - |
dc.contributor.author | Taniguchi, Takashi | - |
dc.contributor.author | Kim, Jehyun | - |
dc.contributor.author | Cha, Soonyoung | - |
dc.contributor.author | Kim, Dohun | - |
dc.contributor.author | Jo, Moon-Ho | - |
dc.contributor.author | Choi, Hyunyong | - |
dc.date.accessioned | 2022-02-28T03:00:06Z | - |
dc.date.available | 2022-02-28T03:00:06Z | - |
dc.date.created | 2022-02-25 | - |
dc.date.issued | 2021-03 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/109565 | - |
dc.description.abstract | <jats:title>Abstract</jats:title><jats:p>The valley Hall effect (VHE) in two-dimensional (2D) van der Waals (vdW) crystals is a promising approach to study the valley pseudospin. Most experiments so far have used bound electron-hole pairs (excitons) through local photoexcitation. However, the valley depolarization of such excitons is fast, so that several challenges remain to be resolved. We address this issue by exploiting a unipolar VHE using a heterobilayer made of monolayer MoS<jats:sub>2</jats:sub>/WTe<jats:sub>2</jats:sub> to exhibit a long valley-polarized lifetime due to the absence of electron-hole exchange interaction. The unipolar VHE is manifested by reduced photoluminescence at the MoS<jats:sub>2</jats:sub> A exciton energy. Furthermore, we provide quantitative information on the time-dependent valley Hall dynamics by performing the spatially-resolved ultrafast Kerr-rotation microscopy; we find that the valley-polarized electrons persist for more than 4 nanoseconds and the valley Hall mobility exceeds 4.49 × 10<jats:sup>3</jats:sup> cm<jats:sup>2</jats:sup>/Vs, which is orders of magnitude larger than previous reports.</jats:p> | - |
dc.language | English | - |
dc.publisher | Nature Publishing Group | - |
dc.relation.isPartOf | Nature Communications | - |
dc.title | Ultrafast non-excitonic valley Hall effect in MoS2/WTe2 heterobilayers | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41467-021-21013-w | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Nature Communications, v.12, no.1 | - |
dc.identifier.wosid | 000630419400026 | - |
dc.citation.number | 1 | - |
dc.citation.title | Nature Communications | - |
dc.citation.volume | 12 | - |
dc.contributor.affiliatedAuthor | Jo, Moon-Ho | - |
dc.identifier.scopusid | 2-s2.0-85102348235 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.relation.journalWebOfScienceCategory | Multidisciplinary Sciences | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
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