Kompaniiets, M. ; Dobrovolskiy, O. V. ; Neetzel, C. ; Porrati, F. ; Brötz, J. ; Ensinger, Wolfgang ; Huth, M. (2014)
Long-range superconducting proximity effect in polycrystalline Co nanowires.
In: Applied Physics Letters, 104 (5)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report experimental evidence of a long-range superconducting proximity effect in polycrystalline Co nanowires in contact with a superconducting W-based floating electrode (inducer). For electrical resistance measurements, voltage leads were connected to the Co nanowire on both sides of the superconducting inducer at a distance of 7.2 µm. We observed a 28% reduction of the nanowire resistance when sweeping the temperature below the inducer's transition temperature Tc = 5.2 K. Our analysis of the resistance data shows that the superconducting proximity length in polycrystalline Co is as large as 1 µm at 2.4 K, attesting to a long-range proximity effect. Moreover, this long-range proximity effect is insusceptible to magnetic fields up to 11 T, which is indicative of spin-triplet pairing. Our results provide evidence that magnetic inhomogeneity of the ferromagnet enlarges the spatial extend of the spin-triplet superconducting proximity effect.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Kompaniiets, M. ; Dobrovolskiy, O. V. ; Neetzel, C. ; Porrati, F. ; Brötz, J. ; Ensinger, Wolfgang ; Huth, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Long-range superconducting proximity effect in polycrystalline Co nanowires |
| Sprache: | Englisch |
| Publikationsjahr: | 3 Februar 2014 |
| Verlag: | AIP Publishing LLC |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 104 |
| (Heft-)Nummer: | 5 |
| URL / URN: | http://scitation.aip.org/content/aip/journal/apl/104/5/10.10... |
| Kurzbeschreibung (Abstract): | We report experimental evidence of a long-range superconducting proximity effect in polycrystalline Co nanowires in contact with a superconducting W-based floating electrode (inducer). For electrical resistance measurements, voltage leads were connected to the Co nanowire on both sides of the superconducting inducer at a distance of 7.2 µm. We observed a 28% reduction of the nanowire resistance when sweeping the temperature below the inducer's transition temperature Tc = 5.2 K. Our analysis of the resistance data shows that the superconducting proximity length in polycrystalline Co is as large as 1 µm at 2.4 K, attesting to a long-range proximity effect. Moreover, this long-range proximity effect is insusceptible to magnetic fields up to 11 T, which is indicative of spin-triplet pairing. Our results provide evidence that magnetic inhomogeneity of the ferromagnet enlarges the spatial extend of the spin-triplet superconducting proximity effect. |
| Freie Schlagworte: | electrical resistivity, Ferromagnetism, Lead, Magnetic fields, nanowires, Polycrystals, scanning electron microscopy, Superconducting proximity effects, Superconductivity, Superconductors |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Feb 2014 15:17 |
| Letzte Änderung: | 22 Jan 2015 12:41 |
| PPN: | |
| Sponsoren: | This work was supported by the Beilstein Institut, Frankfurt/M, within the research collaboration NanoBiC. |
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