Unconventional Josephson Effect in Hybrid Superconductor-Topological Insulator Devices

Abstract

We report on transport properties of Josephson junctions in hybrid superconducting-topological insulator devices, which show two striking departures from the common Josephson junction behavior: a characteristic energy that scales inversely with the width of the junction, and a low characteristic magnetic field for suppressing supercurrent. To explain these effects, we propose a phenomenological model which expands on the existing theory for topological insulator Josephson junctions.

References in corpus (5)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological origin of subgap conductance in insulating bilayer graphene
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• Josephson supercurrent through a topological insulator surface state
• Excitation gap of a graphene channel with superconducting boundaries

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