Conference Presentation (After Call)

FZJ-2026-01373

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Josephson vortex pinning in two-dimensional SNS-arrays

Schäfer, C. (Corresponding author)FZJ* ; Teller, J.FZJ* ; Bennemann, B.FZJ* ; Lyatti, M.FZJ* ; Lentz, F.FZJ* ; Grützmacher, D.FZJ* ; Schäpers, T.FZJ*

2025

Abstract: 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.

Keyword(s): Information and Communication (1st) ; Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. JARA Institut Green IT (PGI-10)
3. Helmholtz - Nanofacility (HNF)

Research Program(s):

1. 5222 - Exploratory Qubits (POF4-522) (POF4-522)
2. DFG project G:(GEPRIS)390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769) (390534769)

Appears in the scientific report 2025

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