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Spin-transfer torque generated in graphene based topological insulator heterostructures
We studied the spin-transfer torque (STT) in graphene based normal-metal/topological-insulator/ferromagnet heterostructures (N/TI/F), which is induced by the helical spin-polarized current in the quantum spin Hall insulator. We found that the STT is comparable in magnitude to the STT in ferromagneti...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5847555/ https://www.ncbi.nlm.nih.gov/pubmed/29531350 http://dx.doi.org/10.1038/s41598-018-22680-4 |
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author | Zhang, Qingtian Chan, K. S. Li, Jingbo |
author_facet | Zhang, Qingtian Chan, K. S. Li, Jingbo |
author_sort | Zhang, Qingtian |
collection | PubMed |
description | We studied the spin-transfer torque (STT) in graphene based normal-metal/topological-insulator/ferromagnet heterostructures (N/TI/F), which is induced by the helical spin-polarized current in the quantum spin Hall insulator. We found that the STT is comparable in magnitude to the STT in ferromagnetic-normal- ferromagnetic graphene junction, while not requiring additional ferromagnetic layer with fixed magnetization, which makes it advantageous for the manipulation of magnetic devices in spintronics. More interestingly, the STT is very robust in our proposed nanostructure, as it is immune to changes in the geometry due to an asymmetrically notch or the presence of random nanopores in the quantum spin Hall insulator. Our theoretical prediction suggests that graphene based quantum spin Hall insulator could be used for very efficient magnetization manipulation for magnetic materials. |
format | Online Article Text |
id | pubmed-5847555 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-58475552018-03-19 Spin-transfer torque generated in graphene based topological insulator heterostructures Zhang, Qingtian Chan, K. S. Li, Jingbo Sci Rep Article We studied the spin-transfer torque (STT) in graphene based normal-metal/topological-insulator/ferromagnet heterostructures (N/TI/F), which is induced by the helical spin-polarized current in the quantum spin Hall insulator. We found that the STT is comparable in magnitude to the STT in ferromagnetic-normal- ferromagnetic graphene junction, while not requiring additional ferromagnetic layer with fixed magnetization, which makes it advantageous for the manipulation of magnetic devices in spintronics. More interestingly, the STT is very robust in our proposed nanostructure, as it is immune to changes in the geometry due to an asymmetrically notch or the presence of random nanopores in the quantum spin Hall insulator. Our theoretical prediction suggests that graphene based quantum spin Hall insulator could be used for very efficient magnetization manipulation for magnetic materials. Nature Publishing Group UK 2018-03-12 /pmc/articles/PMC5847555/ /pubmed/29531350 http://dx.doi.org/10.1038/s41598-018-22680-4 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zhang, Qingtian Chan, K. S. Li, Jingbo Spin-transfer torque generated in graphene based topological insulator heterostructures |
title | Spin-transfer torque generated in graphene based topological insulator heterostructures |
title_full | Spin-transfer torque generated in graphene based topological insulator heterostructures |
title_fullStr | Spin-transfer torque generated in graphene based topological insulator heterostructures |
title_full_unstemmed | Spin-transfer torque generated in graphene based topological insulator heterostructures |
title_short | Spin-transfer torque generated in graphene based topological insulator heterostructures |
title_sort | spin-transfer torque generated in graphene based topological insulator heterostructures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5847555/ https://www.ncbi.nlm.nih.gov/pubmed/29531350 http://dx.doi.org/10.1038/s41598-018-22680-4 |
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