H /e Superconducting Quantum Interference through Trivial Edge States in InAs
Folkert K. De Vries (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab)
Tom Timmerman (Kavli institute of nanoscience Delft, Student TU Delft)
Viacheslav P. Ostroukh (Universiteit Leiden)
Jasper Van Veen (TU Delft - QRD/Kouwenhoven Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
Arjan J.A. Beukman (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab)
Fanming Qu (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab)
Michael Wimmer (TU Delft - QRD/Wimmer Group, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
Andrey A. Kiselev (HRL Laboratories)
Leo P. Kouwenhoven (Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab, Microsoft Quantum Lab Delft, TU Delft - QuTech Advanced Research Centre)
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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 nontopological 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.