Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600081 |
Resumo: | We report conductivity fluctuation measurements in the La1.82Sr0.18CuO4 high temperature superconducting material. The conductivity fluctuation analysis was performed by utilizing the concept of the logarithmic derivative of the conductivity excess. Close and above the critical temperature Tc, we experimentally determine the occurrence of Gaussian and critical fluctuation regimes. Systematic measurements of conductivity as a function of temperature were performed for several values of transport current j. Fluctuation analysis close to the zero resistivity temperature Tc0 was performed and we clearly identified a characteristic exponent, which is analyzed by the dynamical scaling theory and considering a percolation-like transition in a frustrated and disordered system. The observation of a glass-like behavior in our experiments permits to interpret our results as corresponding to a vortex-glass regime. |
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Brazilian Journal of Physics |
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Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductorFluctuationsTransport propertiesGranularityWe report conductivity fluctuation measurements in the La1.82Sr0.18CuO4 high temperature superconducting material. The conductivity fluctuation analysis was performed by utilizing the concept of the logarithmic derivative of the conductivity excess. Close and above the critical temperature Tc, we experimentally determine the occurrence of Gaussian and critical fluctuation regimes. Systematic measurements of conductivity as a function of temperature were performed for several values of transport current j. Fluctuation analysis close to the zero resistivity temperature Tc0 was performed and we clearly identified a characteristic exponent, which is analyzed by the dynamical scaling theory and considering a percolation-like transition in a frustrated and disordered system. The observation of a glass-like behavior in our experiments permits to interpret our results as corresponding to a vortex-glass regime.Sociedade Brasileira de Física2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600081Brazilian Journal of Physics v.36 n.3b 2006reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332006000600081info:eu-repo/semantics/openAccessRoa-Rojas,J.Téllez,D.A. LandínezRojas Sarmiento,M.P.eng2006-12-04T00:00:00Zoai:scielo:S0103-97332006000600081Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2006-12-04T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
title |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
spellingShingle |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor Roa-Rojas,J. Fluctuations Transport properties Granularity |
title_short |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
title_full |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
title_fullStr |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
title_full_unstemmed |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
title_sort |
Pairing and coherence transition in La1.82Sr0.18CuO4 strongly two-dimensional superconductor |
author |
Roa-Rojas,J. |
author_facet |
Roa-Rojas,J. Téllez,D.A. Landínez Rojas Sarmiento,M.P. |
author_role |
author |
author2 |
Téllez,D.A. Landínez Rojas Sarmiento,M.P. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Roa-Rojas,J. Téllez,D.A. Landínez Rojas Sarmiento,M.P. |
dc.subject.por.fl_str_mv |
Fluctuations Transport properties Granularity |
topic |
Fluctuations Transport properties Granularity |
description |
We report conductivity fluctuation measurements in the La1.82Sr0.18CuO4 high temperature superconducting material. The conductivity fluctuation analysis was performed by utilizing the concept of the logarithmic derivative of the conductivity excess. Close and above the critical temperature Tc, we experimentally determine the occurrence of Gaussian and critical fluctuation regimes. Systematic measurements of conductivity as a function of temperature were performed for several values of transport current j. Fluctuation analysis close to the zero resistivity temperature Tc0 was performed and we clearly identified a characteristic exponent, which is analyzed by the dynamical scaling theory and considering a percolation-like transition in a frustrated and disordered system. The observation of a glass-like behavior in our experiments permits to interpret our results as corresponding to a vortex-glass regime. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600081 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600081 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332006000600081 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.36 n.3b 2006 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734863408168960 |