Zeeman- and Orbital-Driven Phase Shifts in Planar Josephson Junctions.

ABSTRACT: We perform supercurrent and tunneling spectroscopy measurements on gate-tunable InAs/Al Josephson junctions (JJs) in an in-plane magnetic field and report on phase shifts in the current-phase relation measured with respect to an absolute phase reference. The impact of orbital effects is investigated by studying multiple devices with different superconducting lead sizes. At low fields, we observe gate-dependent phase shifts of up to φ₀ = 0.5π, which are consistent with a Zeeman field coupling to highly transmissive Andreev bound states via Rashba spin-orbit interaction. A distinct phase shift emerges at larger fields, concomitant with a switching current minimum and the closing and reopening of the superconducting gap. These signatures of an induced phase transition, which might

SUBMITTER: Haxell DZ 

PROVIDER: S-EPMC10540266 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature