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Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system
Spin–orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron–electron interaction regimes, where the single electron picture holds. However...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8155003/ https://www.ncbi.nlm.nih.gov/pubmed/34039969 http://dx.doi.org/10.1038/s41467-021-23483-4 |
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author | Maryenko, D. Kawamura, M. Ernst, A. Dugaev, V. K. Sherman, E. Ya. Kriener, M. Bahramy, M. S. Kozuka, Y. Kawasaki, M. |
author_facet | Maryenko, D. Kawamura, M. Ernst, A. Dugaev, V. K. Sherman, E. Ya. Kriener, M. Bahramy, M. S. Kozuka, Y. Kawasaki, M. |
author_sort | Maryenko, D. |
collection | PubMed |
description | Spin–orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron–electron interaction regimes, where the single electron picture holds. However, SOC can profoundly compete against Coulomb interaction, which could lead to the emergence of unconventional electronic phases. Since SOC depends on the electric field in the crystal including contributions of itinerant electrons, electron–electron interactions can modify this coupling. Here we demonstrate the emergence of the SOC effect in a high-mobility two-dimensional electron system in a simple band structure MgZnO/ZnO semiconductor. This electron system also features strong electron–electron interaction effects. By changing the carrier density with Mg-content, we tune the SOC strength and achieve its interplay with electron–electron interaction. These systems pave a way to emergent spintronic phenomena in strong electron correlation regimes and to the formation of quasiparticles with the electron spin strongly coupled to the density. |
format | Online Article Text |
id | pubmed-8155003 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81550032021-06-11 Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system Maryenko, D. Kawamura, M. Ernst, A. Dugaev, V. K. Sherman, E. Ya. Kriener, M. Bahramy, M. S. Kozuka, Y. Kawasaki, M. Nat Commun Article Spin–orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron–electron interaction regimes, where the single electron picture holds. However, SOC can profoundly compete against Coulomb interaction, which could lead to the emergence of unconventional electronic phases. Since SOC depends on the electric field in the crystal including contributions of itinerant electrons, electron–electron interactions can modify this coupling. Here we demonstrate the emergence of the SOC effect in a high-mobility two-dimensional electron system in a simple band structure MgZnO/ZnO semiconductor. This electron system also features strong electron–electron interaction effects. By changing the carrier density with Mg-content, we tune the SOC strength and achieve its interplay with electron–electron interaction. These systems pave a way to emergent spintronic phenomena in strong electron correlation regimes and to the formation of quasiparticles with the electron spin strongly coupled to the density. Nature Publishing Group UK 2021-05-26 /pmc/articles/PMC8155003/ /pubmed/34039969 http://dx.doi.org/10.1038/s41467-021-23483-4 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Maryenko, D. Kawamura, M. Ernst, A. Dugaev, V. K. Sherman, E. Ya. Kriener, M. Bahramy, M. S. Kozuka, Y. Kawasaki, M. Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title | Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title_full | Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title_fullStr | Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title_full_unstemmed | Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title_short | Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system |
title_sort | interplay of spin–orbit coupling and coulomb interaction in zno-based electron system |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8155003/ https://www.ncbi.nlm.nih.gov/pubmed/34039969 http://dx.doi.org/10.1038/s41467-021-23483-4 |
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