Enhancing speed limits to the Abrikosov vortex dynamics

增强阿布里科索夫涡动力学的速度限制

• 批准号: 374052683
• 负责人: Privatdozent Dr. Oleksandr Dobrovolskiy
• 金额: --
• 依托单位: Fakultät für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/374052683?language=en
• 关键词: Enhancing; speed; limits; Abrikosov; vortex

The main objective of this project is to experimentally probe and enhance the speed limits for the dynamics of Abrikosov vortices in superconducting films subjected to high dc current densities and/or high ac frequencies. A suitable arrangement of linearly-extended periodically arranged pinning sites is used to influence the vortex motion efficiently. We particularly focus on enhancing the upper current and frequency limits for vortex guiding (tendency of vortices to move along the extended pinning sites), the ratchet (rectifying) effect and its reversals, i. e the effects that are crucial for fluxonic devices operating at high vortex velocities. By analyzing similarities and differences between the pulsed-dc-driven and high-frequency-ac-stimulated vortex dynamics, we will be able to scrutinize flux transport mechanisms at work in thin-film superconductors.

该项目的主要目标是通过实验探测和提高高直流电流密度和/或高交流频率下超导薄膜中阿布里科索夫涡旋动力学的速度极限。线性延伸的周期性布置的钉扎位点的适当布置用于有效地影响涡流运动。我们特别关注增强涡流引导（涡流沿着延伸的钉扎位点移动的趋势）、棘轮（整流）效应及其逆转的电流和频率上限，即。这些效应对于在高涡流速度下运行的 Fluxonic 设备至关重要。通过分析脉冲直流驱动和高频交流激励涡流动力学之间的异同，我们将能够仔细研究薄膜超导体中的通量传输机制。

项目成果

Upper Frequency Limits for Vortex Guiding and Ratchet Effects

• DOI: 10.1103/physrevapplied.13.024012
• 发表时间: 2020-02-07
• 期刊: PHYSICAL REVIEW APPLIED
• 影响因子: 4.6
• 作者: Dobrovolskiy, O. V.;Begun, E.;Huth, M.
• 通讯作者: Huth, M.

Moving flux quanta cool superconductors by a microwave breath

• DOI: 10.1038/s42005-020-0329-z
• 发表时间: 2020-04-02
• 期刊: COMMUNICATIONS PHYSICS
• 影响因子: 5.5
• 作者: Dobrovolskiy, O. V.;Gonzalez-Ruano, C.;Aliev, F. G.
• 通讯作者: Aliev, F. G.

Fast Dynamics of Guided Magnetic Flux Quanta

• DOI: 10.1103/physrevapplied.11.054064
• 发表时间: 2019-05-23
• 期刊: PHYSICAL REVIEW APPLIED
• 影响因子: 4.6
• 作者: Dobrovolskiy, O., V;Bevz, V. M.;Huth, M.
• 通讯作者: Huth, M.