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Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material

Anisotropy effects on flux pinning and flux flow are strongly effective in cuprate as well as iron-based superconductors due to their intrinsically layered crystallographic structure. However Fe(Se,Te) thin films grown on CaF(2) substrate result less anisotropic with respect to all the other iron ba...

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Autores principales: Grimaldi, Gaia, Leo, Antonio, Nigro, Angela, Pace, Sandro, Braccini, Valeria, Bellingeri, Emilio, Ferdeghini, Carlo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5841287/
https://www.ncbi.nlm.nih.gov/pubmed/29515198
http://dx.doi.org/10.1038/s41598-018-22417-3
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author Grimaldi, Gaia
Leo, Antonio
Nigro, Angela
Pace, Sandro
Braccini, Valeria
Bellingeri, Emilio
Ferdeghini, Carlo
author_facet Grimaldi, Gaia
Leo, Antonio
Nigro, Angela
Pace, Sandro
Braccini, Valeria
Bellingeri, Emilio
Ferdeghini, Carlo
author_sort Grimaldi, Gaia
collection PubMed
description Anisotropy effects on flux pinning and flux flow are strongly effective in cuprate as well as iron-based superconductors due to their intrinsically layered crystallographic structure. However Fe(Se,Te) thin films grown on CaF(2) substrate result less anisotropic with respect to all the other iron based superconductors. We present the first study on the angular dependence of the flux flow instability, which occurs in the flux flow regime as a current driven transition to the normal state at the instability point (I*, V*) in the current-voltage characteristics. The voltage jumps are systematically investigated as a function of the temperature, the external magnetic field, and the angle between the field and the Fe(Se,Te) film. The scaling procedure based on the anisotropic Ginzburg-Landau approach is successfully applied to the observed angular dependence of the critical voltage V*. Anyway, we find out that Fe(Se,Te) represents the case study of a layered material characterized by a weak anisotropy of its static superconducting properties, but with an increased anisotropy in its vortex dynamics due to the predominant perpendicular component of the external applied magnetic field. Indeed, I* shows less sensitivity to angle variations, thus being promising for high field applications.
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spelling pubmed-58412872018-03-13 Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material Grimaldi, Gaia Leo, Antonio Nigro, Angela Pace, Sandro Braccini, Valeria Bellingeri, Emilio Ferdeghini, Carlo Sci Rep Article Anisotropy effects on flux pinning and flux flow are strongly effective in cuprate as well as iron-based superconductors due to their intrinsically layered crystallographic structure. However Fe(Se,Te) thin films grown on CaF(2) substrate result less anisotropic with respect to all the other iron based superconductors. We present the first study on the angular dependence of the flux flow instability, which occurs in the flux flow regime as a current driven transition to the normal state at the instability point (I*, V*) in the current-voltage characteristics. The voltage jumps are systematically investigated as a function of the temperature, the external magnetic field, and the angle between the field and the Fe(Se,Te) film. The scaling procedure based on the anisotropic Ginzburg-Landau approach is successfully applied to the observed angular dependence of the critical voltage V*. Anyway, we find out that Fe(Se,Te) represents the case study of a layered material characterized by a weak anisotropy of its static superconducting properties, but with an increased anisotropy in its vortex dynamics due to the predominant perpendicular component of the external applied magnetic field. Indeed, I* shows less sensitivity to angle variations, thus being promising for high field applications. Nature Publishing Group UK 2018-03-07 /pmc/articles/PMC5841287/ /pubmed/29515198 http://dx.doi.org/10.1038/s41598-018-22417-3 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Grimaldi, Gaia
Leo, Antonio
Nigro, Angela
Pace, Sandro
Braccini, Valeria
Bellingeri, Emilio
Ferdeghini, Carlo
Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title_full Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title_fullStr Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title_full_unstemmed Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title_short Angular dependence of vortex instability in a layered superconductor: the case study of Fe(Se,Te) material
title_sort angular dependence of vortex instability in a layered superconductor: the case study of fe(se,te) material
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5841287/
https://www.ncbi.nlm.nih.gov/pubmed/29515198
http://dx.doi.org/10.1038/s41598-018-22417-3
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