Erik Zimmermann, Abdur Rehman Jalil, Michael Schleenvoigt, Jan Karthein, Benedikt Frohn, Gerrit Behner, Florian Lentz, Stefan Trellenkamp, Elmar Neumann, Peter Schüffelgen, Hans Lüth, Detlev Grützmacher and Thomas Schäpers
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Topological insulator based axial superconducting quantum interferometer structures
Nanoscale superconducting quantum interference devices are fabricated in-situ from a single Bi0.26Sb1.74Te3 nanoribbon that is defined using selective-area growth and contacted with superconducting Nb electrodes via a shadow mask technique. We present magnetic flux periodic interference in both, fully and non-fully proximitized nanoribbons. The pronounced oscillations are attributed to interference effects of coherent transport through the topological surface states encompassing the cross-section of the nanoribbon.
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