001     1047082
005     20251020202101.0
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100 1 _ |a Teller, Justus
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245 _ _ |a Frustrated Frustration of Arrays with Four-Terminal Nb-Pt-Nb Josephson Junctions
260 _ _ |a College Park, Md.
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500 _ _ |a Germany’s Excellence Strategy— Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC 2004/1–390534769,BMBF Quantum Future project “MajoranaChips” (Grant No. 13N15264)Quantum Future project with Grant No. 13N14891Bavaria’s High-Tech Agenda Project “Bausteine für das Quantencomputing auf Basis topologischer Materialien mit experimentellen und theoretischen Ansätzen” (Grant No. 07 02/686 58/1/21 1/22 2/23)
520 _ _ |a We study the frustration pattern of a square lattice with in situ fabricated Nb-Pt-Nb four-terminal Josephson junctions. The four-terminal geometry gives rise to a checkerboard pattern of alternating fluxes f, f' piercing the plaquettes, which stabilizes the Berezinskii-Kosterlitz-Thouless transition even at irrational flux quanta per plaquette, due to an unequal repartition of integer flux sum f + f' into alternating plaquettes. This type of frustrated frustration manifests as a beating pattern of the dc resistance, with state configurations at the resistance dips gradually changing between the conventional zero- and half-flux states. Hence, the four-terminal Josephson junction array offers a promising platform to study previously unexplored flux and vortex configurations and provides an estimate on the spatial expansion of the fourterminal Josephson junction central weak link area.
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700 1 _ |a Schäfer, Christian
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700 1 _ |a Moors, Kristof
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700 1 _ |a Bennemann, Benjamin
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700 1 _ |a Lyatti, Matvey
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700 1 _ |a Lentz, Florian
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700 1 _ |a Grützmacher, Detlev
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700 1 _ |a Riwar, Roman-Pascal
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700 1 _ |a Schäpers, Thomas
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773 _ _ |a 10.1103/gxdc-py56
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856 4 _ |u https://juser.fz-juelich.de/record/1047082/files/PRL-Teller-2025.pdf
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