Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MON: Monday Contributed Sessions
MON 11: Quantum Transport I
MON 11.7: Vortrag
Montag, 8. September 2025, 15:45–16:00, ZHG104
Josephson vortex pinning in two-dimensional SNS-arrays — •Christian Schäfer1,2, Justus Teller1,2, Benjamin Bennemann3, Matvey Lyatti1,2, Florian Lentz4, Detlev Grützmacher1,2, Roman-Pascal Riwar5, and Thomas Schäpers1,2 — 1Peter Grünberg Institut (PGI-9), Forschungszentrum Jülich, 52425 Jülich, Germany — 2JARA-Fundamentals of Future Information Technology, Jülich-Aachen Research Alliance, Forschungszentrum Jülich and RWTH Aachen University, Germany — 3Peter Grünberg Institut (PGI-10), Forschungszentrum Jülich, 52425 Jülich, Germany — 4Helmholtz Nano Facility, Forschungszentrum Jülich, 52425 Jülich, Germany — 5Peter Grünberg Institut (PGI-2), Forschungszentrum Jülich, 52425 Jülich, Germany
We fabricated Josephson arrays by etching stacked platinum-niobium (Pt-Nb) thin films. By analyzing both small (3 × 3) and large (30 × 30 and 50 × 50) arrays, we examined how array size and edge effects affect the frustration patterns created by the flow of Josephson vortices. Upon cooling the arrays below 300 mK, the energy barrier for vortex motion increases, immobilizing the vortices and causing the array’s behavior to resemble that of a single reference junction. In this vortex-pinned regime, we studied the switching dynamics of the arrays. To determine the distribution of single-junction critical currents within the array, we compared our experimental findings with simulations based on the resistively and capacitively shunted junction (RCSJ) model.
Keywords: Josephson array; vortex pinning; frustrated lattice; superconducting quantum interference; shunted junction