SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 7: Focus Session: Disordered and Granular Superconductors: Fundamentals and Applications in Quantum Technology II
TT 7.3: Vortrag
Dienstag, 28. September 2021, 14:15–14:30, H6
Impact of Kinetic Inductance on the Critical Curren Oscillations of Nanobridge SQUIDs — •Heleen Dausy, Lukas Nulens, Bart Raes, Margriet Van Bael, and Joris Van de Vondel — Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
We study lithographically fabricated MoGe nanobridges and their current phase relation (CΦR), which is linked to the nanobridge kinetic inductance. We do this by imbedding the nanobridges in a SQUID. We observe that for temperatures far below the critical temperature, the CΦR is linear as long as the condensate is not weakened by the presence of supercurrent. Another result is that the nanobridge kinetic inductance scales with its aspect ratio. We demonstrate that the SQUID Ic(B) characteristic is tuneable through lithographic control over the nanobridge dimensions. These observations can be of use for the design and operation of future superconducting devices such as magnetic memories or flux qubits.