Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice

The topological Hall effect (THE), given by a composite of electric and topologically nontrivial spin texture is commonly observed in magnetic skyrmion crystals. Here we present a study of the THE of electrons coupled to antiferromagnetic skyrmion lattices (AF-SkX). We show that, in the strong Hund...

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Detalles Bibliográficos
Autores principales:	Tomé, Martín, Rosales, Héctor Diego
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2021
Materias:	Física Magnetic field Physics Topology Hall effect Orbital magnetization Berry connection and curvature Magnetic skyrmion Texture (cosmology) Topological order Skyrmion
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126739
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126739
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física Magnetic field Physics Topology Hall effect Orbital magnetization Berry connection and curvature Magnetic skyrmion Texture (cosmology) Topological order Skyrmion
spellingShingle	Física Magnetic field Physics Topology Hall effect Orbital magnetization Berry connection and curvature Magnetic skyrmion Texture (cosmology) Topological order Skyrmion Tomé, Martín Rosales, Héctor Diego Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
topic_facet	Física Magnetic field Physics Topology Hall effect Orbital magnetization Berry connection and curvature Magnetic skyrmion Texture (cosmology) Topological order Skyrmion
description	The topological Hall effect (THE), given by a composite of electric and topologically nontrivial spin texture is commonly observed in magnetic skyrmion crystals. Here we present a study of the THE of electrons coupled to antiferromagnetic skyrmion lattices (AF-SkX). We show that, in the strong Hund coupling limit, topologically nontrivial phases emerge at specific fillings. Interestingly, at low filling an external field controlling the magnetic texture drives the system from a conventional insulator phase to a phase exhibiting the THE. Such behavior suggests the occurrence of a topological transition which is confirmed by a closing of the bulk gap that is followed by its reopening, appearing simultaneously with a single pair of helical edge states. This transition is further verified by the calculation of the Chern numbers and Berry curvature. We also compute a variety of observables in order to quantify the THE, namely, Hall conductivity and the orbital magnetization of electrons moving in the AF-SkX texture.
format	Articulo Preprint
author	Tomé, Martín Rosales, Héctor Diego
author_facet	Tomé, Martín Rosales, Héctor Diego
author_sort	Tomé, Martín
title	Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
title_short	Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
title_full	Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
title_fullStr	Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
title_full_unstemmed	Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
title_sort	topological phase transition driven by magnetic field and topological hall effect in an antiferromagnetic skyrmion lattice
publishDate	2021
url	http://sedici.unlp.edu.ar/handle/10915/126739
work_keys_str_mv	AT tomemartin topologicalphasetransitiondrivenbymagneticfieldandtopologicalhalleffectinanantiferromagneticskyrmionlattice AT rosaleshectordiego topologicalphasetransitiondrivenbymagneticfieldandtopologicalhalleffectinanantiferromagneticskyrmionlattice
bdutipo_str	Repositorios
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Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice

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