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Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice
Motivated by the importance of antiferromagnetic skyrmions as building blocks of next-generation data storage and processing devices, we report theoretical and computational analysis of a model for a spin-orbit coupled correlated Hund’s insulator magnet on a triangular lattice. We find that two dist...
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/PMC8100155/ https://www.ncbi.nlm.nih.gov/pubmed/33953234 http://dx.doi.org/10.1038/s41598-021-88556-2 |
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author | Mukherjee, Arnob Kathyat, Deepak S. Kumar, Sanjeev |
author_facet | Mukherjee, Arnob Kathyat, Deepak S. Kumar, Sanjeev |
author_sort | Mukherjee, Arnob |
collection | PubMed |
description | Motivated by the importance of antiferromagnetic skyrmions as building blocks of next-generation data storage and processing devices, we report theoretical and computational analysis of a model for a spin-orbit coupled correlated Hund’s insulator magnet on a triangular lattice. We find that two distinct antiferromagnetic skyrmion crystal (AF-SkX) states can be stabilized at low temperatures in the presence of external magnetic field. The results are obtained via Monte Carlo simulations on an effective magnetic model derived from the microscopic electronic Hamiltonian consisting of Rashba spin-orbit coupling, as well as strong Hund’s coupling of electrons to classical spins at half-filling. The two AF-SkX phases are understood to originate from a classical spin liquid state that exists at low but finite temperatures. These AF-SkX states can be easily distinguished from each other in experiments as they are characterized by peaks at distinct momenta in the spin structure factor which is directly measured in neutron scattering experiments. We also discuss examples of materials where the model as well as the two AF-SkX states can be realized. |
format | Online Article Text |
id | pubmed-8100155 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81001552021-05-07 Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice Mukherjee, Arnob Kathyat, Deepak S. Kumar, Sanjeev Sci Rep Article Motivated by the importance of antiferromagnetic skyrmions as building blocks of next-generation data storage and processing devices, we report theoretical and computational analysis of a model for a spin-orbit coupled correlated Hund’s insulator magnet on a triangular lattice. We find that two distinct antiferromagnetic skyrmion crystal (AF-SkX) states can be stabilized at low temperatures in the presence of external magnetic field. The results are obtained via Monte Carlo simulations on an effective magnetic model derived from the microscopic electronic Hamiltonian consisting of Rashba spin-orbit coupling, as well as strong Hund’s coupling of electrons to classical spins at half-filling. The two AF-SkX phases are understood to originate from a classical spin liquid state that exists at low but finite temperatures. These AF-SkX states can be easily distinguished from each other in experiments as they are characterized by peaks at distinct momenta in the spin structure factor which is directly measured in neutron scattering experiments. We also discuss examples of materials where the model as well as the two AF-SkX states can be realized. Nature Publishing Group UK 2021-05-05 /pmc/articles/PMC8100155/ /pubmed/33953234 http://dx.doi.org/10.1038/s41598-021-88556-2 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Mukherjee, Arnob Kathyat, Deepak S. Kumar, Sanjeev Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title | Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title_full | Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title_fullStr | Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title_full_unstemmed | Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title_short | Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice |
title_sort | antiferromagnetic skyrmion crystals in the rashba hund’s insulator on triangular lattice |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8100155/ https://www.ncbi.nlm.nih.gov/pubmed/33953234 http://dx.doi.org/10.1038/s41598-021-88556-2 |
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