Field-Free Superconducting Diode in a Magnetically Nanostructured Superconductor
Ji Jiang, M.V. Milošević, Yong-Lei Wang, Zhi-Li Xiao, F.M. Peeters, Qing-Hu Chen
DOI 10.1103/PhysRevApplied.18.034064 · Physical Review Applied
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Abstract
A strong superconducting diode effect (SDE) is revealed in a thin superconducting film periodically nanostructured with magnetic dots. The SDE is caused by the current-activated dissipation mitigated by vortex-antivortex pairs (VAPs), which periodically nucleate under the dots, move and annihilate in the superconductor—eventually driving the system to the high-resistive state. Inversing the polarity of the applied current destimulates the nucleation of VAPs, the system remains superconducting up to far larger currents, leading to the pronounced diodic response. Our dissipative Ginzburg-Landau simulations detail the involved processes, and provide reliable geometric and parametric ranges for the experimental realization of such a nonvolatile superconducting diode, which operates in the absence of any applied magnetic field while being fluxonic by design.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb/V/Ta Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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