Unconventional Josephson Effect in Hybrid Superconductor-Topological Insulator Devices

2012/02/29 by J. R. Williams, A. J. Bestwick, P. Gallagher +6 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.109.056803

published as Physical Review Letters 109 056803 (2012)

arxiv created 2012/09/10 · arxiv updated 2015/06/04

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.

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