Article,
Tuning the Josephson diode response with an ac current
Affiliations
- [1] CSIC, Inst Ciencia Mat Madrid ICMM, Sor Juana Ines Cruz 3, Madrid 28049, Spain [NORA names: Spain; Europe, EU; OECD];
- [2] CSIC, Inst Ciencia Mat Madrid ICMM, Sor Juana Ines Cruz 3, Madrid 28049, Spain [NORA names: Spain; Europe, EU; OECD];
- [3] Lund Univ, Div Solid State Phys & NanoLund, S-22100 Lund, Sweden [NORA names: Sweden; Europe, EU; Nordic; OECD];
- [4] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, DK-2100 Copenhagen, Denmark [NORA names: KU University of Copenhagen; University; Denmark; Europe, EU; Nordic; OECD];
- [5] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, DK-2100 Copenhagen, Denmark [NORA names: KU University of Copenhagen; University; Denmark; Europe, EU; Nordic; OECD];
(... more)
Abstract
Josephson diodes are superconducting elements that show an asymmetry in the critical current depending on the direction of the current. Here, we theoretically explore how an alternating current bias can tune the response of such a diode. We show that for slow driving there is always a regime where the system can only carry zero -voltage dc current in one direction, thus effectively behaving as an ideal Josephson diode. Under fast driving, the diode efficiency is also tunable, although the ideal regime cannot be reached in this case. We also investigate the residual dissipation due to the time -dependent current bias and show that it remains small. All our conclusions are solely based on the critical current asymmetry of the junction, and are thus compatible with any Josephson diode.