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Tunable Spin Injection in High-Quality Graphene with One-Dimensional Contacts
[Image: see text] Spintronics involves the development of low-dimensional electronic systems with potential use in quantum-based computation. In graphene, there has been significant progress in improving spin transport characteristics by encapsulation and reducing impurities, but the influence of st...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9098166/ https://www.ncbi.nlm.nih.gov/pubmed/35089714 http://dx.doi.org/10.1021/acs.nanolett.1c03625 |
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author | Guarochico-Moreira, Victor H. Sambricio, Jose L. Omari, Khalid Anderson, Christopher R. Bandurin, Denis A. Toscano-Figueroa, Jesus C. Natera-Cordero, Noel Watanabe, Kenji Taniguchi, Takashi Grigorieva, Irina V. Vera-Marun, Ivan J. |
author_facet | Guarochico-Moreira, Victor H. Sambricio, Jose L. Omari, Khalid Anderson, Christopher R. Bandurin, Denis A. Toscano-Figueroa, Jesus C. Natera-Cordero, Noel Watanabe, Kenji Taniguchi, Takashi Grigorieva, Irina V. Vera-Marun, Ivan J. |
author_sort | Guarochico-Moreira, Victor H. |
collection | PubMed |
description | [Image: see text] Spintronics involves the development of low-dimensional electronic systems with potential use in quantum-based computation. In graphene, there has been significant progress in improving spin transport characteristics by encapsulation and reducing impurities, but the influence of standard two-dimensional (2D) tunnel contacts, via pinholes and doping of the graphene channel, remains difficult to eliminate. Here, we report the observation of spin injection and tunable spin signal in fully encapsulated graphene, enabled by van der Waals heterostructures with one-dimensional (1D) contacts. This architecture prevents significant doping from the contacts, enabling high-quality graphene channels, currently with mobilities up to 130 000 cm(2) V(–1) s(–1) and spin diffusion lengths approaching 20 μm. The nanoscale-wide 1D contacts allow spin injection both at room and at low temperature, with the latter exhibiting efficiency comparable with 2D tunnel contacts. At low temperature, the spin signals can be enhanced by as much as an order of magnitude by electrostatic gating, adding new functionality. |
format | Online Article Text |
id | pubmed-9098166 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-90981662022-05-13 Tunable Spin Injection in High-Quality Graphene with One-Dimensional Contacts Guarochico-Moreira, Victor H. Sambricio, Jose L. Omari, Khalid Anderson, Christopher R. Bandurin, Denis A. Toscano-Figueroa, Jesus C. Natera-Cordero, Noel Watanabe, Kenji Taniguchi, Takashi Grigorieva, Irina V. Vera-Marun, Ivan J. Nano Lett [Image: see text] Spintronics involves the development of low-dimensional electronic systems with potential use in quantum-based computation. In graphene, there has been significant progress in improving spin transport characteristics by encapsulation and reducing impurities, but the influence of standard two-dimensional (2D) tunnel contacts, via pinholes and doping of the graphene channel, remains difficult to eliminate. Here, we report the observation of spin injection and tunable spin signal in fully encapsulated graphene, enabled by van der Waals heterostructures with one-dimensional (1D) contacts. This architecture prevents significant doping from the contacts, enabling high-quality graphene channels, currently with mobilities up to 130 000 cm(2) V(–1) s(–1) and spin diffusion lengths approaching 20 μm. The nanoscale-wide 1D contacts allow spin injection both at room and at low temperature, with the latter exhibiting efficiency comparable with 2D tunnel contacts. At low temperature, the spin signals can be enhanced by as much as an order of magnitude by electrostatic gating, adding new functionality. American Chemical Society 2022-01-28 2022-02-09 /pmc/articles/PMC9098166/ /pubmed/35089714 http://dx.doi.org/10.1021/acs.nanolett.1c03625 Text en © 2022 American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Guarochico-Moreira, Victor H. Sambricio, Jose L. Omari, Khalid Anderson, Christopher R. Bandurin, Denis A. Toscano-Figueroa, Jesus C. Natera-Cordero, Noel Watanabe, Kenji Taniguchi, Takashi Grigorieva, Irina V. Vera-Marun, Ivan J. Tunable Spin Injection in High-Quality Graphene with One-Dimensional Contacts |
title | Tunable Spin Injection in High-Quality Graphene with
One-Dimensional Contacts |
title_full | Tunable Spin Injection in High-Quality Graphene with
One-Dimensional Contacts |
title_fullStr | Tunable Spin Injection in High-Quality Graphene with
One-Dimensional Contacts |
title_full_unstemmed | Tunable Spin Injection in High-Quality Graphene with
One-Dimensional Contacts |
title_short | Tunable Spin Injection in High-Quality Graphene with
One-Dimensional Contacts |
title_sort | tunable spin injection in high-quality graphene with
one-dimensional contacts |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9098166/ https://www.ncbi.nlm.nih.gov/pubmed/35089714 http://dx.doi.org/10.1021/acs.nanolett.1c03625 |
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