Topological solitons and bulk polarization switch in collinear type-II multiferroics

We introduce a microscopic model for collinear multiferroics capable of reproducing, as a consequence of magnetic frustration and easy-axis anisotropy, the so-called ``uudd'' (or antiphase) magnetic ordering observed in several type-II multiferroic materials. The crucial role of lattice di...

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Detalles Bibliográficos
Autores principales: Cabra, Daniel Carlos, Dobry, Ariel, Gazza, Claudio, Rossini, Gerardo Luis
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2021
Materias:
Física
Polarization (waves)
Magnetic field
Physics
Multiferroics
Topology
Lattice (order)
Dipole
Electric dipole moment
Density matrix renormalization group
Anisotropy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124525
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124525
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Polarization (waves)
Magnetic field
Physics
Multiferroics
Topology
Lattice (order)
Dipole
Electric dipole moment
Density matrix renormalization group
Anisotropy
spellingShingle Física
Polarization (waves)
Magnetic field
Physics
Multiferroics
Topology
Lattice (order)
Dipole
Electric dipole moment
Density matrix renormalization group
Anisotropy
Cabra, Daniel Carlos
Dobry, Ariel
Gazza, Claudio
Rossini, Gerardo Luis
Topological solitons and bulk polarization switch in collinear type-II multiferroics
topic_facet Física
Polarization (waves)
Magnetic field
Physics
Multiferroics
Topology
Lattice (order)
Dipole
Electric dipole moment
Density matrix renormalization group
Anisotropy
description We introduce a microscopic model for collinear multiferroics capable of reproducing, as a consequence of magnetic frustration and easy-axis anisotropy, the so-called ``uudd'' (or antiphase) magnetic ordering observed in several type-II multiferroic materials. The crucial role of lattice distortions in the multiferroic character of these materials enters into the model via an indirect magnetoelectric coupling, mediated by elastic degrees of freedom through a pantograph mechanism. Long-range dipolar interactions set electric dipoles in the antiferroelectric order. We investigate this model by means of extensive density matrix renormalization group computations and complementary analytical methods. We show that a lattice dimerization induces a spontaneous ℤ₂ ferrielectric bulk polarization, with a sharp switch off produced by a magnetic field above a critical value. The topological character of the magnetic excitations makes this mechanism robust.
format Articulo
Preprint
author Cabra, Daniel Carlos
Dobry, Ariel
Gazza, Claudio
Rossini, Gerardo Luis
author_facet Cabra, Daniel Carlos
Dobry, Ariel
Gazza, Claudio
Rossini, Gerardo Luis
author_sort Cabra, Daniel Carlos
title Topological solitons and bulk polarization switch in collinear type-II multiferroics
title_short Topological solitons and bulk polarization switch in collinear type-II multiferroics
title_full Topological solitons and bulk polarization switch in collinear type-II multiferroics
title_fullStr Topological solitons and bulk polarization switch in collinear type-II multiferroics
title_full_unstemmed Topological solitons and bulk polarization switch in collinear type-II multiferroics
title_sort topological solitons and bulk polarization switch in collinear type-ii multiferroics
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/124525
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AT dobryariel topologicalsolitonsandbulkpolarizationswitchincollineartypeiimultiferroics
AT gazzaclaudio topologicalsolitonsandbulkpolarizationswitchincollineartypeiimultiferroics
AT rossinigerardoluis topologicalsolitonsandbulkpolarizationswitchincollineartypeiimultiferroics
bdutipo_str Repositorios
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