Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice

We study the effects of an in-plane Dzyaloshinskii-Moriya interaction under an external magnetic field in the highly frustrated kagome antiferromagnet. We focus on the low-temperature phase diagram, which we obtain through extensive Monte Carlo simulations. We show that, given the geometric frustrat...

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Detalles Bibliográficos
Autores principales:	Villalba, Martín Emilio, Gómez Albarracín, Flavia Alejandra, Rosales, Héctor Diego, Cabra, Daniel Carlos
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2019
Materias:	Física Magnetic field Physics Paramagnetism Lattice (order) Antiferromagnetism Condensed matter physics Frustration Topological order Phase diagram Skyrmion
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125191
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125191
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 Paramagnetism Lattice (order) Antiferromagnetism Condensed matter physics Frustration Topological order Phase diagram Skyrmion
spellingShingle	Física Magnetic field Physics Paramagnetism Lattice (order) Antiferromagnetism Condensed matter physics Frustration Topological order Phase diagram Skyrmion Villalba, Martín Emilio Gómez Albarracín, Flavia Alejandra Rosales, Héctor Diego Cabra, Daniel Carlos Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
topic_facet	Física Magnetic field Physics Paramagnetism Lattice (order) Antiferromagnetism Condensed matter physics Frustration Topological order Phase diagram Skyrmion
description	We study the effects of an in-plane Dzyaloshinskii-Moriya interaction under an external magnetic field in the highly frustrated kagome antiferromagnet. We focus on the low-temperature phase diagram, which we obtain through extensive Monte Carlo simulations. We show that, given the geometric frustration of the lattice, highly nontrivial phases emerge. At low fields, lowering the temperature from a cooperative paramagnet phase, the kagome elementary plaquettes form noncoplanar arrangements with nonzero chirality, retaining a partial degeneracy. As the field increases, there is a transition from this ``locally chiral phase'' to an interpenetrated spiral phase with broken Z₃ symmetry. Furthermore, we identify a quasi-skyrmion phase in a large portion of the magnetic phase diagram, which we characterize with a topological order parameter, the scalar chirality by triangular sublattice. This pseudo-skyrmion phase consists of a crystal arrangement of three interpenetrated non-Bravais lattices of skyrmionlike textures, but with a non-(fully)-polarized core. The edges of these pseudo-skyrmions remain polarized with the field, as the cores are progressively canted. Results show that this pseudo-skyrmion phase is stable up to the lowest simulated temperatures and for a broad range of magnetic fields.
format	Articulo Preprint
author	Villalba, Martín Emilio Gómez Albarracín, Flavia Alejandra Rosales, Héctor Diego Cabra, Daniel Carlos
author_facet	Villalba, Martín Emilio Gómez Albarracín, Flavia Alejandra Rosales, Héctor Diego Cabra, Daniel Carlos
author_sort	Villalba, Martín Emilio
title	Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
title_short	Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
title_full	Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
title_fullStr	Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
title_full_unstemmed	Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
title_sort	field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/125191
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bdutipo_str	Repositorios
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Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice

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