Observation of the non-linear Meissner effect

A long-standing theoretical prediction is that in clean, nodal unconventional superconductors the magnetic penetration depth λ, at zero temperature, varies linearly with magnetic field. This non-linear Meissner effect is an equally important manifestation of the nodal state as the well studied linea...

Descripción completa

Detalles Bibliográficos
Autores principales: Wilcox, J. A., Grant, M. J., Malone, L., Putzke, C., Kaczorowski, D., Wolf, T., Hardy, F., Meingast, C., Analytis, J. G., Chu, J.-H., Fisher, I. R., Carrington, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8901765/
https://www.ncbi.nlm.nih.gov/pubmed/35256611
http://dx.doi.org/10.1038/s41467-022-28790-y
_version_ 1784664442615627776
author Wilcox, J. A.
Grant, M. J.
Malone, L.
Putzke, C.
Kaczorowski, D.
Wolf, T.
Hardy, F.
Meingast, C.
Analytis, J. G.
Chu, J.-H.
Fisher, I. R.
Carrington, A.
author_facet Wilcox, J. A.
Grant, M. J.
Malone, L.
Putzke, C.
Kaczorowski, D.
Wolf, T.
Hardy, F.
Meingast, C.
Analytis, J. G.
Chu, J.-H.
Fisher, I. R.
Carrington, A.
author_sort Wilcox, J. A.
collection PubMed
description A long-standing theoretical prediction is that in clean, nodal unconventional superconductors the magnetic penetration depth λ, at zero temperature, varies linearly with magnetic field. This non-linear Meissner effect is an equally important manifestation of the nodal state as the well studied linear-in-T dependence of λ, but has never been convincingly experimentally observed. Here we present measurements of the nodal superconductors CeCoIn(5) and LaFePO which clearly show this non-linear Meissner effect. We further show how the effect of a small dc magnetic field on λ(T) can be used to distinguish gap nodes from non-nodal deep gap minima. Our measurements of KFe(2)As(2) suggest that this material has such a non-nodal state.
format Online
Article
Text
id pubmed-8901765
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-89017652022-03-23 Observation of the non-linear Meissner effect Wilcox, J. A. Grant, M. J. Malone, L. Putzke, C. Kaczorowski, D. Wolf, T. Hardy, F. Meingast, C. Analytis, J. G. Chu, J.-H. Fisher, I. R. Carrington, A. Nat Commun Article A long-standing theoretical prediction is that in clean, nodal unconventional superconductors the magnetic penetration depth λ, at zero temperature, varies linearly with magnetic field. This non-linear Meissner effect is an equally important manifestation of the nodal state as the well studied linear-in-T dependence of λ, but has never been convincingly experimentally observed. Here we present measurements of the nodal superconductors CeCoIn(5) and LaFePO which clearly show this non-linear Meissner effect. We further show how the effect of a small dc magnetic field on λ(T) can be used to distinguish gap nodes from non-nodal deep gap minima. Our measurements of KFe(2)As(2) suggest that this material has such a non-nodal state. Nature Publishing Group UK 2022-03-07 /pmc/articles/PMC8901765/ /pubmed/35256611 http://dx.doi.org/10.1038/s41467-022-28790-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Wilcox, J. A.
Grant, M. J.
Malone, L.
Putzke, C.
Kaczorowski, D.
Wolf, T.
Hardy, F.
Meingast, C.
Analytis, J. G.
Chu, J.-H.
Fisher, I. R.
Carrington, A.
Observation of the non-linear Meissner effect
title Observation of the non-linear Meissner effect
title_full Observation of the non-linear Meissner effect
title_fullStr Observation of the non-linear Meissner effect
title_full_unstemmed Observation of the non-linear Meissner effect
title_short Observation of the non-linear Meissner effect
title_sort observation of the non-linear meissner effect
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8901765/
https://www.ncbi.nlm.nih.gov/pubmed/35256611
http://dx.doi.org/10.1038/s41467-022-28790-y
work_keys_str_mv AT wilcoxja observationofthenonlinearmeissnereffect
AT grantmj observationofthenonlinearmeissnereffect
AT malonel observationofthenonlinearmeissnereffect
AT putzkec observationofthenonlinearmeissnereffect
AT kaczorowskid observationofthenonlinearmeissnereffect
AT wolft observationofthenonlinearmeissnereffect
AT hardyf observationofthenonlinearmeissnereffect
AT meingastc observationofthenonlinearmeissnereffect
AT analytisjg observationofthenonlinearmeissnereffect
AT chujh observationofthenonlinearmeissnereffect
AT fisherir observationofthenonlinearmeissnereffect
AT carringtona observationofthenonlinearmeissnereffect

Ejemplares similares