Niedzielski Bjoern, Jia Chenglong, Berakdar Jamal
Institut für Physik, Martin-Luther Universität Halle-Wittenberg, 06099 Halle (Saale), Germany.
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education and Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China.
Nanomaterials (Basel). 2021 Jan 13;11(1):184. doi: 10.3390/nano11010184.
We study the transport and the superconducting dynamics in a layer of type II superconductor (SC) with a normal top layer that hosts a helical magnetic ordering that gives rise to spin-current-driven ferroelectric polarization. Proximity effects akin to this heterostructure result in an anisotropic supercurrent transport and modify the dynamic properties of vortices in the SC. The vortices can be acted upon and controlled by electric gating or other means that couple to the spin ordering in the top layer, which, in turn, alter the superconducting/helical magnet coupling characteristics. We demonstrate, using the time dependent Ginzburg-Landau approach, how the spin helicity of the top layer can be utilized for pinning and guiding the vortices in the superconducting layer.
我们研究了具有正常顶层的II型超导体（SC）层中的输运和超导动力学，该顶层具有螺旋磁有序，可产生自旋电流驱动的铁电极化。类似于这种异质结构的近邻效应会导致各向异性的超电流输运，并改变SC中涡旋的动力学性质。涡旋可以通过电门控或其他与顶层自旋有序耦合的方式来作用和控制，这反过来又会改变超导/螺旋磁体的耦合特性。我们使用含时金兹堡 - 朗道方法证明了顶层的自旋螺旋度如何用于钉扎和引导超导层中的涡旋。
