Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: MOSQUERA POLO, Ariday Samit
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Universidade Federal de Pernambuco
UFPE
Brasil
Programa de Pos Graduacao em Fisica
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Física da matéria condensada
Supercondutividade
Dinâmica de vórtices
Link de acesso: https://repositorio.ufpe.br/handle/123456789/29958
Resumo: We demonstrate that in a weak-coupled two-band superconducting slab the interaction between vortices penetrating the sample and its boundaries leads to the phenomenon of vortex splitting, which divides composite vortices and creates fractional ones. The interaction between vortices, attractive for different bands and repulsive for the same band, which is controlled by the electric current density flowing through the system, leads to an ordered alternating arrangement of the vortices. This arrangement creates non-equilibrium interband phase textures or domains with different signs of the Josephson energy of the interaction between the band condensates. Such phase textures have a significant effect on the dissipation caused by the vortex motion. In particular, in the phase-texture regime the onset of the dissipation is shifted to higher current densities. It is also demonstrated that increasing the sample size hinders the emergence of separate vortices, and that the introduction of linear pinning barriers facilitates the decoupling of the vortex network.
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spelling Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductorsFísica da matéria condensadaSupercondutividadeDinâmica de vórticesWe demonstrate that in a weak-coupled two-band superconducting slab the interaction between vortices penetrating the sample and its boundaries leads to the phenomenon of vortex splitting, which divides composite vortices and creates fractional ones. The interaction between vortices, attractive for different bands and repulsive for the same band, which is controlled by the electric current density flowing through the system, leads to an ordered alternating arrangement of the vortices. This arrangement creates non-equilibrium interband phase textures or domains with different signs of the Josephson energy of the interaction between the band condensates. Such phase textures have a significant effect on the dissipation caused by the vortex motion. In particular, in the phase-texture regime the onset of the dissipation is shifted to higher current densities. It is also demonstrated that increasing the sample size hinders the emergence of separate vortices, and that the introduction of linear pinning barriers facilitates the decoupling of the vortex network.CAPESO modelo de Ginzburg-Landau com duas componentes foi aplicado a uma placa supercondutora com dois parâmetros de ordem, submetida a um campo magnético estático (H) e a uma densidade de corrente (j), para estudar as configurações e a dinâmica de vórtices. É demonstrado que, no limite de acoplamento fraco entre bandas, a interação entre vórtices penetrando na amostra com a superfície da mesma produz um fenômeno de separação de vórtices, dividindo os vórtices compósitos e criando vórtices fracionários. A interação entre vórtices, que é atrativa interbandas e repulsiva intrabanda e é controlada pela densida de corrente aplicada ao sistema, produz um ordenamento alternado de vórtices. Esse ordenamento cria texturas de fase de não-equilíbrio, ou domínios com sinais opostos da interação Josephson entre os condensados. Essa textura de fase possui efeitos significativos na dissipação causada pelo movimento de vórtices. Em particular, no regime de textura de fase, a corrente crítica, necessária para o inicio da dissipação, é deslocada para valores mais altos. É demonstrado também, que o aumento das dimensões da amostra dificulta o surgimento de vórtices separados, e que a introdução de barreiras lineares de ancoragem facilita o desacoplamento da rede de vórtices.Universidade Federal de PernambucoUFPEBrasilPrograma de Pos Graduacao em FisicaAGUIAR, Jose Albino Oliveira dehttp://lattes.cnpq.br/2506297668346004http://lattes.cnpq.br/5602764549201959MOSQUERA POLO, Ariday Samit2019-04-01T21:59:52Z2019-04-01T21:59:52Z2017-10-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfhttps://repositorio.ufpe.br/handle/123456789/29958engAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPEinstname:Universidade Federal de Pernambuco (UFPE)instacron:UFPE2019-10-26T02:55:47Zoai:repositorio.ufpe.br:123456789/29958Repositório InstitucionalPUBhttps://repositorio.ufpe.br/oai/requestattena@ufpe.bropendoar:22212019-10-26T02:55:47Repositório Institucional da UFPE - Universidade Federal de Pernambuco (UFPE)false
dc.title.none.fl_str_mv Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
title Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
spellingShingle Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
MOSQUERA POLO, Ariday Samit
Física da matéria condensada
Supercondutividade
Dinâmica de vórtices
title_short Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
title_full Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
title_fullStr Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
title_full_unstemmed Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
title_sort Nonequilibrium interband phase textures induced by vortex splitting in two-band superconductors
author MOSQUERA POLO, Ariday Samit
author_facet MOSQUERA POLO, Ariday Samit
author_role author
dc.contributor.none.fl_str_mv AGUIAR, Jose Albino Oliveira de
http://lattes.cnpq.br/2506297668346004
http://lattes.cnpq.br/5602764549201959
dc.contributor.author.fl_str_mv MOSQUERA POLO, Ariday Samit
dc.subject.por.fl_str_mv Física da matéria condensada
Supercondutividade
Dinâmica de vórtices
topic Física da matéria condensada
Supercondutividade
Dinâmica de vórtices
description We demonstrate that in a weak-coupled two-band superconducting slab the interaction between vortices penetrating the sample and its boundaries leads to the phenomenon of vortex splitting, which divides composite vortices and creates fractional ones. The interaction between vortices, attractive for different bands and repulsive for the same band, which is controlled by the electric current density flowing through the system, leads to an ordered alternating arrangement of the vortices. This arrangement creates non-equilibrium interband phase textures or domains with different signs of the Josephson energy of the interaction between the band condensates. Such phase textures have a significant effect on the dissipation caused by the vortex motion. In particular, in the phase-texture regime the onset of the dissipation is shifted to higher current densities. It is also demonstrated that increasing the sample size hinders the emergence of separate vortices, and that the introduction of linear pinning barriers facilitates the decoupling of the vortex network.
publishDate 2017
dc.date.none.fl_str_mv 2017-10-20
2019-04-01T21:59:52Z
2019-04-01T21:59:52Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://repositorio.ufpe.br/handle/123456789/29958
url https://repositorio.ufpe.br/handle/123456789/29958
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Pernambuco
UFPE
Brasil
Programa de Pos Graduacao em Fisica
publisher.none.fl_str_mv Universidade Federal de Pernambuco
UFPE
Brasil
Programa de Pos Graduacao em Fisica
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFPE
instname:Universidade Federal de Pernambuco (UFPE)
instacron:UFPE
instname_str Universidade Federal de Pernambuco (UFPE)
instacron_str UFPE
institution UFPE
reponame_str Repositório Institucional da UFPE
collection Repositório Institucional da UFPE
repository.name.fl_str_mv Repositório Institucional da UFPE - Universidade Federal de Pernambuco (UFPE)
repository.mail.fl_str_mv attena@ufpe.br
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