Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1088/1361-648X/ac0081 http://hdl.handle.net/11449/210402 |
Resumo: | We numerically examine the dynamics of a single skyrmion driven over triangular and honeycomb obstacle arrays at zero temperature. The skyrmion Hall angle theta (sk), defined as the angle between the applied external drive and the direction of the skyrmion motion, increases in quantized steps or continuously as a function of the applied drive. For the obstacle arrays studied in this work, the skyrmion exhibits two main directional locking angles of theta (sk) = -30 degrees and -60 degrees. We show that these directions are privileged due to the obstacle landscape symmetry, and coincide with channels along which the skyrmion may move with few or no obstacle collisions. Here we investigate how changes in the obstacle density can modify the skyrmion Hall angles and cause some dynamic phases to appear or grow while other phases vanish. This interesting behavior can be used to guide skyrmions along designated trajectories via regions with different obstacle densities. For fixed obstacle densities, we investigate the evolution of the locked theta (sk) = -30 degrees and -60 degrees phases as a function of the Magnus force, and discuss possibilities for switching between these phases using topological selection. |
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Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arraysmagnetismskyrmion dynamicsdirectional lockingpinningWe numerically examine the dynamics of a single skyrmion driven over triangular and honeycomb obstacle arrays at zero temperature. The skyrmion Hall angle theta (sk), defined as the angle between the applied external drive and the direction of the skyrmion motion, increases in quantized steps or continuously as a function of the applied drive. For the obstacle arrays studied in this work, the skyrmion exhibits two main directional locking angles of theta (sk) = -30 degrees and -60 degrees. We show that these directions are privileged due to the obstacle landscape symmetry, and coincide with channels along which the skyrmion may move with few or no obstacle collisions. Here we investigate how changes in the obstacle density can modify the skyrmion Hall angles and cause some dynamic phases to appear or grow while other phases vanish. This interesting behavior can be used to guide skyrmions along designated trajectories via regions with different obstacle densities. For fixed obstacle densities, we investigate the evolution of the locked theta (sk) = -30 degrees and -60 degrees phases as a function of the Magnus force, and discuss possibilities for switching between these phases using topological selection.US Department of Energy through the Los Alamos National LaboratoryNational Nuclear Security Administration of the US Department of EnergyFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista UNESP, Fac Ciencias, POSMAT Programa Posgrad Ciencia & Tecnol Mat, CP 473, BR-17033360 Bauru, SP, BrazilUniv Estadual Paulista UNESP, Fac Ciencias, Dept Fis, CP 473, BR-17033360 Bauru, SP, BrazilLos Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USALos Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USAUniv Estadual Paulista UNESP, Fac Ciencias, POSMAT Programa Posgrad Ciencia & Tecnol Mat, CP 473, BR-17033360 Bauru, SP, BrazilUniv Estadual Paulista UNESP, Fac Ciencias, Dept Fis, CP 473, BR-17033360 Bauru, SP, BrazilNational Nuclear Security Administration of the US Department of Energy: 892333218NCA000001FAPESP: 2017/20976-3Iop Publishing LtdUniversidade Estadual Paulista (Unesp)Los Alamos Natl LabVizarim, N. P. [UNESP]Bellizotti Souza, J. C. [UNESP]Reichhardt, C.Reichhardt, C. J. O.Venegas, P. A. [UNESP]2021-06-25T15:07:31Z2021-06-25T15:07:31Z2021-07-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9http://dx.doi.org/10.1088/1361-648X/ac0081Journal Of Physics-condensed Matter. Bristol: Iop Publishing Ltd, v. 33, n. 30, 9 p., 2021.0953-8984http://hdl.handle.net/11449/21040210.1088/1361-648X/ac0081WOS:000659673300001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Physics-condensed Matterinfo:eu-repo/semantics/openAccess2024-04-25T17:39:41Zoai:repositorio.unesp.br:11449/210402Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-25T17:39:41Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
title |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
spellingShingle |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays Vizarim, N. P. [UNESP] magnetism skyrmion dynamics directional locking pinning |
title_short |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
title_full |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
title_fullStr |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
title_full_unstemmed |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
title_sort |
Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays |
author |
Vizarim, N. P. [UNESP] |
author_facet |
Vizarim, N. P. [UNESP] Bellizotti Souza, J. C. [UNESP] Reichhardt, C. Reichhardt, C. J. O. Venegas, P. A. [UNESP] |
author_role |
author |
author2 |
Bellizotti Souza, J. C. [UNESP] Reichhardt, C. Reichhardt, C. J. O. Venegas, P. A. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Los Alamos Natl Lab |
dc.contributor.author.fl_str_mv |
Vizarim, N. P. [UNESP] Bellizotti Souza, J. C. [UNESP] Reichhardt, C. Reichhardt, C. J. O. Venegas, P. A. [UNESP] |
dc.subject.por.fl_str_mv |
magnetism skyrmion dynamics directional locking pinning |
topic |
magnetism skyrmion dynamics directional locking pinning |
description |
We numerically examine the dynamics of a single skyrmion driven over triangular and honeycomb obstacle arrays at zero temperature. The skyrmion Hall angle theta (sk), defined as the angle between the applied external drive and the direction of the skyrmion motion, increases in quantized steps or continuously as a function of the applied drive. For the obstacle arrays studied in this work, the skyrmion exhibits two main directional locking angles of theta (sk) = -30 degrees and -60 degrees. We show that these directions are privileged due to the obstacle landscape symmetry, and coincide with channels along which the skyrmion may move with few or no obstacle collisions. Here we investigate how changes in the obstacle density can modify the skyrmion Hall angles and cause some dynamic phases to appear or grow while other phases vanish. This interesting behavior can be used to guide skyrmions along designated trajectories via regions with different obstacle densities. For fixed obstacle densities, we investigate the evolution of the locked theta (sk) = -30 degrees and -60 degrees phases as a function of the Magnus force, and discuss possibilities for switching between these phases using topological selection. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T15:07:31Z 2021-06-25T15:07:31Z 2021-07-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1088/1361-648X/ac0081 Journal Of Physics-condensed Matter. Bristol: Iop Publishing Ltd, v. 33, n. 30, 9 p., 2021. 0953-8984 http://hdl.handle.net/11449/210402 10.1088/1361-648X/ac0081 WOS:000659673300001 |
url |
http://dx.doi.org/10.1088/1361-648X/ac0081 http://hdl.handle.net/11449/210402 |
identifier_str_mv |
Journal Of Physics-condensed Matter. Bristol: Iop Publishing Ltd, v. 33, n. 30, 9 p., 2021. 0953-8984 10.1088/1361-648X/ac0081 WOS:000659673300001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Physics-condensed Matter |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
9 |
dc.publisher.none.fl_str_mv |
Iop Publishing Ltd |
publisher.none.fl_str_mv |
Iop Publishing Ltd |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964811809783808 |