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@INPROCEEDINGS{Schpers:1053016,
      author       = {Schäpers, Thomas},
      title        = {{S}uperconductive {C}oupling and {J}osephson {D}iode
                      {E}ffect in {M}ulti-{T}erminal {H}ybrid {S}tructures based
                      on {T}opological {I}nsulators},
      reportid     = {FZJ-2026-01360},
      year         = {2025},
      abstract     = {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.},
      month         = {Oct},
      date          = {2025-10-27},
      organization  = {International Workshop on Hybrid
                       Quantum Materials, Sciences, and
                       Technologies 2025, Matsue (Japan), 27
                       Oct 2025 - 29 Oct 2025},
      subtyp        = {Invited},
      cin          = {PGI-9},
      cid          = {I:(DE-Juel1)PGI-9-20110106},
      pnm          = {5222 - Exploratory Qubits (POF4-522) / EXC 2004:  Matter
                      and Light for Quantum Computing (ML4Q) (390534769) / DFG
                      project G:(GEPRIS)491798118 - Magnetische topologische
                      Isolatoren für robuste Majorana Zustände (491798118)},
      pid          = {G:(DE-HGF)POF4-5222 / G:(BMBF)390534769 /
                      G:(GEPRIS)491798118},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1053016},
}