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DOI: 10.5445/IR/1000082584
Veröffentlicht am 07.05.2018

Tailoring supercurrent confinement in graphene bilayer weak links

Kraft, Rainer; Mohrmann, Jens; Du, Renjun; Selvasundaram, Pranauv Balaji; Irfan, Muhammad; Kanilmaz, Umut Nefta; Wu, Fan; Beckmann, Detlef; von Löhneysen, Hilbert; Krupke, Ralph; Akhmerov, Anton; Gornyi, Igor; Danneau, Romain

Abstract:
The Josephson effect is one of the most studied macroscopic quantum phenomena in condensed matter physics and has been an essential part of the quantum technologies development over the last decades. It is already used in many applications such as magnetometry, metrology, quantum computing, detectors or electronic refrigeration. However, developing devices in which the induced superconductivity can be monitored, both spatially and in its magnitude, remains a serious challenge. In this work, we have used local gates to control confinement, amplitude and density profile of the supercurrent induced in one-dimensional nanoscale constrictions, defined in bilayer graphene-hexagonal boron nitride van der Waals heterostructures. The combination of resistance gate maps, out-of-equilibrium transport, magnetic interferometry measurements, analytical and numerical modelling enables us to explore highly tunable superconducting weak links. Our study opens the path way to design more complex superconducting circuits based on this principle, such as electronic interferometers or transition-edge sensors.


Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Institut für Nanotechnologie (INT)
Institut für Theorie der Kondensierten Materie (TKM)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2041-1723
URN: urn:nbn:de:swb:90-825844
KITopen ID: 1000082584
HGF-Programm 43.21.03; LK 01
Erschienen in Nature Communications
Band 9
Heft 1
Seiten Art. Nr. 1722
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 30.04.2018
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