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arXiv · 1709.03727

$h/e$ superconducting quantum interference through trivial edge states in InAs

Folkert K. de Vries·Tom Timmerman·Viacheslav P. Ostroukh·Jasper van Veen·Arjan J. A. Beukman·Fanming Qu·Michael Wimmer·Binh-Minh Nguyen·Andrey A. Kiselev·Wei Yi·Marko Sokolich·Michael J. Manfra·Charles M. Marcus·Leo P. Kouwenhoven
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Abstract

Josephson junctions defined in strong spin orbit semiconductors are highly interesting for the search for topological systems. However, next to topological edge states that emerge in a sufficient magnetic field, trivial edge states can also occur. We study the trivial edge states with superconducting quantum interference measurements on non-topological InAs Josephson junctions. We observe a SQUID pattern, an indication of superconducting edge transport. Also, a remarkable $h/e$ SQUID signal is observed that, as we find, stems from crossed Andreev states.

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Folkert K. de Vries, Tom Timmerman, Viacheslav P. Ostroukh, Jasper van Veen, Arjan J. A. Beukman, Fanming Qu, Michael Wimmer, Binh-Minh Nguyen, Andrey A. Kiselev, Wei Yi, Marko Sokolich, Michael J. Manfra, Charles M. Marcus, Leo P. Kouwenhoven. 2017-09-12. $h/e$ superconducting quantum interference through trivial edge states in InAs. https://doi.org/10.1103/physrevlett.120.047702

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