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

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.

References in corpus (21)

• Topological Insulators
• Quantum Spin Hall Effect in Graphene
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
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• Effects of spin-orbit coupling and spatial symmetries on the Josephson current in SNS junctions
• Decoupling edge versus bulk conductance in the trivial regime of an InAs/GaSb double quantum well using Corbino ring geometry
• Even-odd flux quanta effect in the Fraunhofer oscillations of an edge-channel Josephson junction
• Proximity-induced superconductivity and Josephson critical current in quantum spin Hall systems
• Effective g-factors of carriers in inverted InAs/GaSb bilayers
• Edge effects in the magnetic interference pattern of a ballistic SNS junction

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• Superconducting proximity effect in $d$-wave cuprate/ graphene heterostructures
• Majorana fermions on the quantum Hall edge
• Gate-tunable Electronic Transport in p-type GaSb Quantum Wells
• Beyond the effective length: How to analyze magnetic interference patterns of thin-film planar Josephson junctions with finite lateral dimensions
• Edgeless and Purely Gate-Defined Nanostructures in InAs Quantum Wells
• Majorana bound states in topological insulators with hidden Dirac points
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• Supercurrent mediated by helical edge modes in bilayer graphene
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• Effects of the Spatial Extension of the Edge Channels on the Interference Pattern of a Helical Josephson Junction
• SQUID pattern disruption in transition metal dichalcogenide Josephson junctions due to non-parabolic dispersion of the edge states
• Spin-resolved spectroscopy of helical Andreev bound states
• Random-gate-voltage induced Al'tshuler-Aronov-Spivak effect in topological edge states
• Gate-Tunable Ambipolar Josephson Current in a Topological Insulator
• Clean quantum point contacts in an InAs quantum well grown on a lattice-mismatched InP substrate
• Local Control of Supercurrent Density in Epitaxial Planar Josephson Junctions
• Diamond-shaped evolution of the superconducting interference pattern in NbTiN weak-link Josephson junctions