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Directional interlayer spin-valley transfer in two-dimensional heterostructures
Van der Waals heterostructures formed by two different monolayer semiconductors have emerged as a promising platform for new optoelectronic and spin/valleytronic applications. In addition to its atomically thin nature, a two-dimensional semiconductor heterostructure is distinct from its three-dimens...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5171822/ https://www.ncbi.nlm.nih.gov/pubmed/27966524 http://dx.doi.org/10.1038/ncomms13747 |
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author | Schaibley, John R. Rivera, Pasqual Yu, Hongyi Seyler, Kyle L. Yan, Jiaqiang Mandrus, David G. Taniguchi, Takashi Watanabe, Kenji Yao, Wang Xu, Xiaodong |
author_facet | Schaibley, John R. Rivera, Pasqual Yu, Hongyi Seyler, Kyle L. Yan, Jiaqiang Mandrus, David G. Taniguchi, Takashi Watanabe, Kenji Yao, Wang Xu, Xiaodong |
author_sort | Schaibley, John R. |
collection | PubMed |
description | Van der Waals heterostructures formed by two different monolayer semiconductors have emerged as a promising platform for new optoelectronic and spin/valleytronic applications. In addition to its atomically thin nature, a two-dimensional semiconductor heterostructure is distinct from its three-dimensional counterparts due to the unique coupled spin-valley physics of its constituent monolayers. Here, we report the direct observation that an optically generated spin-valley polarization in one monolayer can be transferred between layers of a two-dimensional MoSe(2)–WSe(2) heterostructure. Using non-degenerate optical circular dichroism spectroscopy, we show that charge transfer between two monolayers conserves spin-valley polarization and is only weakly dependent on the twist angle between layers. Our work points to a new spin-valley pumping scheme in nanoscale devices, provides a fundamental understanding of spin-valley transfer across the two-dimensional interface, and shows the potential use of two-dimensional semiconductors as a spin-valley generator in two-dimensional spin/valleytronic devices for storing and processing information. |
format | Online Article Text |
id | pubmed-5171822 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51718222016-12-23 Directional interlayer spin-valley transfer in two-dimensional heterostructures Schaibley, John R. Rivera, Pasqual Yu, Hongyi Seyler, Kyle L. Yan, Jiaqiang Mandrus, David G. Taniguchi, Takashi Watanabe, Kenji Yao, Wang Xu, Xiaodong Nat Commun Article Van der Waals heterostructures formed by two different monolayer semiconductors have emerged as a promising platform for new optoelectronic and spin/valleytronic applications. In addition to its atomically thin nature, a two-dimensional semiconductor heterostructure is distinct from its three-dimensional counterparts due to the unique coupled spin-valley physics of its constituent monolayers. Here, we report the direct observation that an optically generated spin-valley polarization in one monolayer can be transferred between layers of a two-dimensional MoSe(2)–WSe(2) heterostructure. Using non-degenerate optical circular dichroism spectroscopy, we show that charge transfer between two monolayers conserves spin-valley polarization and is only weakly dependent on the twist angle between layers. Our work points to a new spin-valley pumping scheme in nanoscale devices, provides a fundamental understanding of spin-valley transfer across the two-dimensional interface, and shows the potential use of two-dimensional semiconductors as a spin-valley generator in two-dimensional spin/valleytronic devices for storing and processing information. Nature Publishing Group 2016-12-14 /pmc/articles/PMC5171822/ /pubmed/27966524 http://dx.doi.org/10.1038/ncomms13747 Text en Copyright © 2016, 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 Schaibley, John R. Rivera, Pasqual Yu, Hongyi Seyler, Kyle L. Yan, Jiaqiang Mandrus, David G. Taniguchi, Takashi Watanabe, Kenji Yao, Wang Xu, Xiaodong Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title | Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title_full | Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title_fullStr | Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title_full_unstemmed | Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title_short | Directional interlayer spin-valley transfer in two-dimensional heterostructures |
title_sort | directional interlayer spin-valley transfer in two-dimensional heterostructures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5171822/ https://www.ncbi.nlm.nih.gov/pubmed/27966524 http://dx.doi.org/10.1038/ncomms13747 |
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