TY - JOUR
T1 - Tailoring supercurrent confinement in graphene bilayer weak links
AU - Kraft, Rainer
AU - Mohrmann, Jens
AU - Du, Renjun
AU - Selvasundaram, Pranauv Balaji
AU - Irfan, Muhammad
AU - Kanilmaz, Umut Nefta
AU - Wu, Fan
AU - Beckmann, Detlef
AU - Von Löhneysen, Hilbert
AU - Krupke, Ralph
AU - Akhmerov, Anton
AU - Gornyi, Igor
AU - Danneau, Romain
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
UR - http://resolver.tudelft.nl/uuid:5879d656-b6b6-47e2-89b0-8d45ee869a62
UR - http://www.scopus.com/inward/record.url?scp=85046355083&partnerID=8YFLogxK
U2 - 10.1038/s41467-018-04153-4
DO - 10.1038/s41467-018-04153-4
M3 - Article
AN - SCOPUS:85046355083
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 1722
ER -