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Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film
The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of the global crystal space group has limited the search for spintronics materials mainly to non-centrosymmetric materials. In recent times it has been suggested that spin polarization originates fu...
Autores principales: | , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290424/ https://www.ncbi.nlm.nih.gov/pubmed/28139646 http://dx.doi.org/10.1038/ncomms14216 |
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author | Yao, Wei Wang, Eryin Huang, Huaqing Deng, Ke Yan, Mingzhe Zhang, Kenan Miyamoto, Koji Okuda, Taichi Li, Linfei Wang, Yeliang Gao, Hongjun Liu, Chaoxing Duan, Wenhui Zhou, Shuyun |
author_facet | Yao, Wei Wang, Eryin Huang, Huaqing Deng, Ke Yan, Mingzhe Zhang, Kenan Miyamoto, Koji Okuda, Taichi Li, Linfei Wang, Yeliang Gao, Hongjun Liu, Chaoxing Duan, Wenhui Zhou, Shuyun |
author_sort | Yao, Wei |
collection | PubMed |
description | The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of the global crystal space group has limited the search for spintronics materials mainly to non-centrosymmetric materials. In recent times it has been suggested that spin polarization originates fundamentally from local atomic site asymmetries and therefore centrosymmetric materials may exhibit previously overlooked spin polarizations. Here, by using spin- and angle-resolved photoemission spectroscopy, we report the observation of helical spin texture in monolayer, centrosymmetric and semiconducting PtSe(2) film without the characteristic spin splitting in conventional Rashba effect (R-1). First-principles calculations and effective analytical model analysis suggest local dipole induced Rashba effect (R-2) with spin-layer locking: opposite spins are degenerate in energy, while spatially separated in the top and bottom Se layers. These results not only enrich our understanding of the spin polarization physics but also may find applications in electrically tunable spintronics. |
format | Online Article Text |
id | pubmed-5290424 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-52904242017-02-07 Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film Yao, Wei Wang, Eryin Huang, Huaqing Deng, Ke Yan, Mingzhe Zhang, Kenan Miyamoto, Koji Okuda, Taichi Li, Linfei Wang, Yeliang Gao, Hongjun Liu, Chaoxing Duan, Wenhui Zhou, Shuyun Nat Commun Article The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of the global crystal space group has limited the search for spintronics materials mainly to non-centrosymmetric materials. In recent times it has been suggested that spin polarization originates fundamentally from local atomic site asymmetries and therefore centrosymmetric materials may exhibit previously overlooked spin polarizations. Here, by using spin- and angle-resolved photoemission spectroscopy, we report the observation of helical spin texture in monolayer, centrosymmetric and semiconducting PtSe(2) film without the characteristic spin splitting in conventional Rashba effect (R-1). First-principles calculations and effective analytical model analysis suggest local dipole induced Rashba effect (R-2) with spin-layer locking: opposite spins are degenerate in energy, while spatially separated in the top and bottom Se layers. These results not only enrich our understanding of the spin polarization physics but also may find applications in electrically tunable spintronics. Nature Publishing Group 2017-01-31 /pmc/articles/PMC5290424/ /pubmed/28139646 http://dx.doi.org/10.1038/ncomms14216 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Yao, Wei Wang, Eryin Huang, Huaqing Deng, Ke Yan, Mingzhe Zhang, Kenan Miyamoto, Koji Okuda, Taichi Li, Linfei Wang, Yeliang Gao, Hongjun Liu, Chaoxing Duan, Wenhui Zhou, Shuyun Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title | Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title_full | Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title_fullStr | Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title_full_unstemmed | Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title_short | Direct observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe(2) film |
title_sort | direct observation of spin-layer locking by local rashba effect in monolayer semiconducting ptse(2) film |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290424/ https://www.ncbi.nlm.nih.gov/pubmed/28139646 http://dx.doi.org/10.1038/ncomms14216 |
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