论文标题
在磁性纳米结构超导体中无现场的超导二极管
Field-free superconducting diode in a magnetically nanostructured superconductor
论文作者
论文摘要
在带有磁点的定期纳米结构的薄超导膜中揭示了强大的超导二极管效应（SDE）。 SDE是由通过涡流 - 抗体对（VAP）减轻的电流激活的耗散引起的，该对在点下定期成核，在超导体中移动和歼灭 - 最终将系统推向高电阻状态。逆转所应用电流的极性会破坏VAP的成核，该系统仍将超导能力达到更大的电流，从而导致明显的二极管响应。我们的耗散的金茨堡 - 兰道模拟详细介绍了所涉及的过程，并为这种非挥发性超导二极管的实验实现提供了可靠的几何和参数范围，该二极管在没有任何应用磁场的情况下运行，而设计为磁场。
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 non-volatile superconducting diode, which operates in absence of any applied magnetic field while being fluxonic by design.
