2023/07/27 by Alex Zazunov, Zazunov, A., Jérôme Rech +9 · 1 citation
Physics and Astronomy · Computer Science · #Quantum and electron transport phenomena #Quantum Information and Cryptography #Physics of Superconductivity and Magnetism
paper · pdf · doi:10.48550/arxiv.2307.14698
We analyze the rectification properties of voltage-biased Josephson junctions exhibiting the superconducting diode effect. Taking into account multiple Andreev reflection (MAR) processes in our scattering theory, we consider a short weak link of arbitrary transparency between two superconductors with finite Cooper pair momentum 2q. In equilibrium, the diode efficiency is bounded from above in this model, with maximal efficiency η0≈ 0.4. Out of equilibrium, we find a rich subharmonic structure in the current-voltage curve. For high transparency and low bias voltage V, the rectification efficiency η(V) approaches the ideal value η=1 for qξ→ 1 (with coherence length ξ).