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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2015

Topological Josephson phi(0) junctions

Manuel Houzet
Julia S. Meyer


We study the effect of amagnetic field on the current-phase relation of a topological Josephson junction formed by connecting two superconductors through the helical edge states of a quantum spin-Hall insulator. We predict that the Zeeman effect along the spin quantization axis of the helical edges results in an anomalous Josephson relation that allows for a supercurrent to flow in the absence of superconducting phase bias. We relate the associated field-tunable phase shift phi(0) in the Josephson relation of such a phi(0) junction to the existence of a so-called helical superconductivity, which may result from the interplay of the Zeeman effect and spin-orbit coupling. We analyze the dependence of the magneto-supercurrent on the junction length and discuss its observability in suitably designed hybrid structures subject to an in-plane magnetic field.

Dates and versions

hal-01589781 , version 1 (19-09-2017)



Fabrizio Dolcini, Manuel Houzet, Julia S. Meyer. Topological Josephson phi(0) junctions. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (3), pp.035428. ⟨10.1103/PhysRevB.92.035428⟩. ⟨hal-01589781⟩
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