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001     1053016
005     20260202125355.0
037 _ _ |a FZJ-2026-01360
041 _ _ |a English
100 1 _ |a Schäpers, Thomas
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111 2 _ |a International Workshop on Hybrid Quantum Materials, Sciences, and Technologies 2025
|g HQMST2025
|c Matsue
|d 2025-10-27 - 2025-10-29
|w Japan
245 _ _ |a Superconductive Coupling and Josephson Diode Effect in Multi-Terminal Hybrid Structures based on Topological Insulators
260 _ _ |c 2025
336 7 _ |a Conference Paper
|0 33
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336 7 _ |a Other
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336 7 _ |a INPROCEEDINGS
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520 _ _ |a Combining s-type superconductors with three-dimensional topological insulators creates a promising platform for fault-tolerant topological quantum circuits based on Majorana braiding. The braiding mechanism is built around a three-terminal Josephson junction. However, implementing this concept requires a deeper understanding of the underlying mechanisms in topological insulator nanoribbon networks equipped with superconducting electrodes. Our devices are fabricated using a combination of selective-area growth of the topological insulator and shadow mask evaporation of the superconductor. Firstly, we investigate nanoribbon kinks and T-junctions of the topological insulator. In kink structures we observed a π-periodic change in conductance depending on the direction of an in-plane magnetic field. We attribute this phenomenon to an orbital effect that leads to the alignment or misalignment of phase-coherent states on the lower and upper surfaces of the kink branches, depending on the orientation of the magnetic field. Next, we measure the transport properties of three-terminal topological insulator-based Josephson junctions and analyze the junctions' cross-coupling. When an out-of-plane magnetic field is applied, a multi-terminal geometry-induced diode effect is observed. Work done in collaboration with: Gerrit Behner, Abdur Rehman Jalil, Kristof Moors, Michael Schleenvoigt, Erik Zimmermann, Alina Rupp, Justus Teller, Franz Fischer, Peter Schüffelgen, Makoto Kohda, Hans Lüth, Detlev Grützmacher.
536 _ _ |a 5222 - Exploratory Qubits (POF4-522)
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536 _ _ |a EXC 2004:  Matter and Light for Quantum Computing (ML4Q) (390534769)
|0 G:(BMBF)390534769
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536 _ _ |a DFG project G:(GEPRIS)491798118 - Magnetische topologische Isolatoren für robuste Majorana Zustände (491798118)
|0 G:(GEPRIS)491798118
|c 491798118
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650 2 7 |a Condensed Matter Physics
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650 1 7 |a Information and Communication
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856 4 _ |u https://jointquantum2025.jp/
909 C O |o oai:juser.fz-juelich.de:1053016
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910 1 _ |a Forschungszentrum Jülich
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980 _ _ |a UNRESTRICTED

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