Charge and spin transport in mesoscopic superconductors

Background: Non-equilibrium charge transport in superconductors has been investigated intensely in the 1970s and 1980s, mostly in the vicinity of the critical temperature. Much less attention has been paid to low temperatures and the role of the quasiparticle spin. Results: We report here on nonloca...

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Autores principales: Wolf, M J, Hübler, F, Kolenda, S, Beckmann, D
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3944028/
https://www.ncbi.nlm.nih.gov/pubmed/24605283
http://dx.doi.org/10.3762/bjnano.5.18
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author Wolf, M J
Hübler, F
Kolenda, S
Beckmann, D
author_facet Wolf, M J
Hübler, F
Kolenda, S
Beckmann, D
author_sort Wolf, M J
collection PubMed
description Background: Non-equilibrium charge transport in superconductors has been investigated intensely in the 1970s and 1980s, mostly in the vicinity of the critical temperature. Much less attention has been paid to low temperatures and the role of the quasiparticle spin. Results: We report here on nonlocal transport in superconductor hybrid structures at very low temperatures. By comparing the nonlocal conductance obtained by using ferromagnetic and normal-metal detectors, we discriminate charge and spin degrees of freedom. We observe spin injection and long-range transport of pure, chargeless spin currents in the regime of large Zeeman splitting. We elucidate charge and spin transport by comparison to theoretical models. Conclusion: The observed long-range chargeless spin transport opens a new path to manipulate and utilize the quasiparticle spin in superconductor nanostructures.
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spelling pubmed-39440282014-03-06 Charge and spin transport in mesoscopic superconductors Wolf, M J Hübler, F Kolenda, S Beckmann, D Beilstein J Nanotechnol Full Research Paper Background: Non-equilibrium charge transport in superconductors has been investigated intensely in the 1970s and 1980s, mostly in the vicinity of the critical temperature. Much less attention has been paid to low temperatures and the role of the quasiparticle spin. Results: We report here on nonlocal transport in superconductor hybrid structures at very low temperatures. By comparing the nonlocal conductance obtained by using ferromagnetic and normal-metal detectors, we discriminate charge and spin degrees of freedom. We observe spin injection and long-range transport of pure, chargeless spin currents in the regime of large Zeeman splitting. We elucidate charge and spin transport by comparison to theoretical models. Conclusion: The observed long-range chargeless spin transport opens a new path to manipulate and utilize the quasiparticle spin in superconductor nanostructures. Beilstein-Institut 2014-02-17 /pmc/articles/PMC3944028/ /pubmed/24605283 http://dx.doi.org/10.3762/bjnano.5.18 Text en Copyright © 2014, Wolf et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Wolf, M J
Hübler, F
Kolenda, S
Beckmann, D
Charge and spin transport in mesoscopic superconductors
title Charge and spin transport in mesoscopic superconductors
title_full Charge and spin transport in mesoscopic superconductors
title_fullStr Charge and spin transport in mesoscopic superconductors
title_full_unstemmed Charge and spin transport in mesoscopic superconductors
title_short Charge and spin transport in mesoscopic superconductors
title_sort charge and spin transport in mesoscopic superconductors
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3944028/
https://www.ncbi.nlm.nih.gov/pubmed/24605283
http://dx.doi.org/10.3762/bjnano.5.18
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