Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice

Abstract 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...

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Autores principales:	Arnob Mukherjee, Deepak S. Kathyat, Sanjeev Kumar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f5bdbe1de51740e58e91900f64135a08
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spelling	oai:doaj.org-article:f5bdbe1de51740e58e91900f64135a082021-12-02T16:49:12ZAntiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice10.1038/s41598-021-88556-22045-2322https://doaj.org/article/f5bdbe1de51740e58e91900f64135a082021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88556-2https://doaj.org/toc/2045-2322Abstract 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.Arnob MukherjeeDeepak S. KathyatSanjeev KumarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Arnob Mukherjee Deepak S. Kathyat Sanjeev Kumar Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice
description	Abstract 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	article
author	Arnob Mukherjee Deepak S. Kathyat Sanjeev Kumar
author_facet	Arnob Mukherjee Deepak S. Kathyat Sanjeev Kumar
author_sort	Arnob Mukherjee
title	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_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_sort	antiferromagnetic skyrmion crystals in the rashba hund’s insulator on triangular lattice
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f5bdbe1de51740e58e91900f64135a08
work_keys_str_mv	AT arnobmukherjee antiferromagneticskyrmioncrystalsintherashbahundsinsulatorontriangularlattice AT deepakskathyat antiferromagneticskyrmioncrystalsintherashbahundsinsulatorontriangularlattice AT sanjeevkumar antiferromagneticskyrmioncrystalsintherashbahundsinsulatorontriangularlattice
_version_	1718383430922665984

Antiferromagnetic skyrmion crystals in the Rashba Hund’s insulator on triangular lattice

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