Superconducting triplet pairing in Al/Al₂O₃/Ni/Ga junctions

Es ist eine neuere Version dieses Eintrags verfügbar.

Dokumentenart:	Artikel
Titel eines Journals oder einer Zeitschrift:	arXiv preprint
Datum:	8 Februar 2021
Institutionen:	Physik > Institut für Theoretische Physik > Lehrstuhl Professor Richter > Arbeitsgruppe Jaroslav Fabian
Projekte:	NSF Grant DMR 1700137, ONR Grant N00014-16-1-2657, ONR Grant N00014-20-1-2306, John Templeton Foundation Grant 39944, John Templeton Foundation Grant 60148, Elite Network of Bavaria, SFB 1277: Emergente relativistische Effekte in der Kondensierten Materie: Von grundlegenden Aspekten zu elektronischer Funktionalität
Dewey-Dezimal-Klassifikation:	500 Naturwissenschaften und Mathematik > 530 Physik
Status:	Veröffentlicht
Begutachtet:	Nein, diese Version wurde noch nicht begutachtet (bei preprints)
An der Universität Regensburg entstanden:	Ja
Dokumenten-ID:	44797

Zusammenfassung

Ni/Ga bilayers are a versatile playground for exploring the competition of the strongly antagonistic ferromagnetic and superconducting phases. Systematically characterizing this competition’s impact on highly ballistic Al/Al₂O₃/Ni/Ga junctions’ transport properties from both the experimental and theoretical viewpoints, we identify novel conductance peak structures, which are caused by ...

Zusammenfassung

Ni/Ga bilayers are a versatile playground for exploring the competition of the strongly antagonistic ferromagnetic and superconducting phases. Systematically characterizing this competition’s impact on highly ballistic Al/Al₂O₃/Ni/Ga junctions’ transport properties from both the experimental and theoretical viewpoints, we identify novel conductance peak structures, which are caused by superconducting triplet pairings at the Ni/Ga interface, and which are widely adjustable through the Ni–Ga thickness ratio. We demonstrate that these conductance anomalies persist even in the presence of an in-plane magnetic field, which provides—together with the detection of the paramagnetic Meissner effect in Ga—the clear experimental evidence that the observed conductance features serve indeed as the triplet pairings’ unique transport fingerprints. Our work demonstrates that Ni/Ga bilayers have a strong potential for superconducting spintronics applications, in particular for triplet-pairing engineering.

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