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

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arxiv 1709.03727 v2 pith:HNGS233V submitted 2017-09-12 cond-mat.mes-hall

Folkert K. de Vries , Tom Timmerman , Viacheslav P. Ostroukh , Jasper van Veen , Arjan J. A. Beukman , Fanming Qu , Michael Wimmer , Binh-Minh Nguyen
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Andrey A. Kiselev Wei Yi Marko Sokolich Michael J. Manfra Charles M. Marcus Leo P. Kouwenhoven
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classification cond-mat.mes-hall
keywords edgestatessuperconductingtrivialinasinterferencejosephsonjunctions
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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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