Kompaniiets, M. ; Dobrovolskiy, O. V. ; Neetzel, Cornelia ; Begun, E. ; Porrati, F. ; Ensinger, Wolfgang ; Huth, M. (2014)
Proximity-induced superconductivity in crystalline Cu and Co nanowires and nanogranular Co structures.
In: Journal of Applied Physics, 116 (7)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report an experimental study of proximity effect-induced superconductivity in crystalline Cu and Co nanowires and a nanogranular Co nanowire structure in contact with a superconducting W-based floating electrode (inducer). For electrical resistance measurements up to three pairs of Pt-based voltage leads were attached at different distances beside the inner inducer electrode, thus allowing us to probe the proximity effect over a length of 2-12 µm. Up to 30% resistance drops with respect to the normal-state value have been observed for the crystalline Co and Cu nanowires when sweeping the temperature below Tc of the inducer (5.2 K). By contrast, relative R(T) drops were found to be an order of magnitude smaller for the nanogranular Co nanowire structure. Our analysis of the resistance data shows that the superconducting proximity length in crystalline Cu and Co is about 1 µm at 2.4 K, attesting to a long-range proximity effect in the Co nanowire. Moreover, this long-range proximity effect is insusceptible to magnetic fields up to 11 T, which is indicative of spin-triplet pairing. At the same time, proximity-induced superconductivity in the nanogranular Co nanowire is strongly suppressed due to the dominating Cooper pair scattering caused by its intrinsic microstructure.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Kompaniiets, M. ; Dobrovolskiy, O. V. ; Neetzel, Cornelia ; Begun, E. ; Porrati, F. ; Ensinger, Wolfgang ; Huth, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Proximity-induced superconductivity in crystalline Cu and Co nanowires and nanogranular Co structures |
| Sprache: | Englisch |
| Publikationsjahr: | August 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 116 |
| (Heft-)Nummer: | 7 |
| URL / URN: | http://scitation.aip.org/content/aip/journal/jap/116/7/10.10... |
| Kurzbeschreibung (Abstract): | We report an experimental study of proximity effect-induced superconductivity in crystalline Cu and Co nanowires and a nanogranular Co nanowire structure in contact with a superconducting W-based floating electrode (inducer). For electrical resistance measurements up to three pairs of Pt-based voltage leads were attached at different distances beside the inner inducer electrode, thus allowing us to probe the proximity effect over a length of 2-12 µm. Up to 30% resistance drops with respect to the normal-state value have been observed for the crystalline Co and Cu nanowires when sweeping the temperature below Tc of the inducer (5.2 K). By contrast, relative R(T) drops were found to be an order of magnitude smaller for the nanogranular Co nanowire structure. Our analysis of the resistance data shows that the superconducting proximity length in crystalline Cu and Co is about 1 µm at 2.4 K, attesting to a long-range proximity effect in the Co nanowire. Moreover, this long-range proximity effect is insusceptible to magnetic fields up to 11 T, which is indicative of spin-triplet pairing. At the same time, proximity-induced superconductivity in the nanogranular Co nanowire is strongly suppressed due to the dominating Cooper pair scattering caused by its intrinsic microstructure. |
| Freie Schlagworte: | copper, electrical resistivity, electrodes, nanowires, Superconductivity models |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 14 Sep 2014 15:59 |
| Letzte Änderung: | 14 Sep 2014 15:59 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum