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arXiv · 2210.01037

Anomalous Josephson effect in planar noncentrosymmetric superconducting devices

Jaglul Hasan·Konstantin N. Nesterov·Songci Li·Manuel Houzet·Julia S. Meyer·Alex Levchenko
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Abstract

In two-dimensional electron systems with broken inversion and time-reversal symmetries, a Josephson junction reveals an anomalous response: the supercurrent is nonzero even at zero phase difference between two superconductors. We consider details of this peculiar phenomenon in the planar double-barrier configurations of hybrid circuits, where the noncentrosymmetric normal region is described in terms of the paradigmatic Rashba model of spin-orbit coupling. We analyze this anomalous Josephson effect by means of both the Ginzburg-Landau formalism and the microscopic Green's functions approach in the clean limit. The magnitude of the critical current is calculated for an arbitrary in-plane magnetic field orientation, and anomalous phase shifts in the Josephson current-phase relation are determined in terms of the parameters of the model in several limiting cases.

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Jaglul Hasan, Konstantin N. Nesterov, Songci Li, Manuel Houzet, Julia S. Meyer, Alex Levchenko. 2022-10-03. Anomalous Josephson effect in planar noncentrosymmetric superconducting devices. https://doi.org/10.1103/physrevb.106.214518

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