Skyrmion-(Anti)Vortex Coupling in a Chiral Magnet-Superconductor Heterostructure

Skyrmion spin texture in ferromagnetic semiconductor-superconductor heterostructures

We provide a derivation of a spin Skyrmion number classification for two-dimensional topological superconductors constructed from ferromagnetic and Rashba spin-orbit coupled semiconductor-superconductor heterostructures. We show that in the non-trivial topological phase, characterized by a non-zero Chern number, there is always a topological spin texture in the occupied bands represented by a Skyrmion number. The Skyrmion number has the advantage of being both physically intuitive and directly measurable using spin-sensitive band structure imaging techniques. In addition, we show that the Skyr…

Interaction of Skyrmions and Pearl Vortices in Superconductor-Chiral Ferromagnet Heterostructures

We investigate a hybrid heterostructure with magnetic skyrmions (Sk) inside a chiral ferromagnet interfaced by a thin superconducting film via an insulating barrier. The barrier prevents the electronic transport between the superconductor and the chiral magnet, such that the coupling can only occur through the magnetic fields generated by these materials. We find that Pearl vortices (PV) are generated spontaneously in the superconductor within the skyrmion radius, while anti-Pearl vortices (\(\overline{\mathrm{PV}}\)) compensating the magnetic moment of the Pearl vortices are generated outside…

Mesoscale phase separation of skyrmion-vortex matter in chiral magnet-superconductor heterostructures

We investigate theoretically the equilibrium configurations of many magnetic skyrmions interacting with many superconducting vortices in a superconductor-chiral magnet bilayer. We show that miscible mixtures of vortices and skyrmions in this system breaks down at a particular wave number for sufficiently strong coupling, giving place to remarkably diverse mesoscale patterns: gel, stripes, clusters, intercalated stripes and composite gel-cluster structures. We also demonstrate that, by appropriate choice of parameters, one can thermally tune between the homogeneous and density-modulated phases.

薄铁磁体-超导体异质结构中 Néel 型斯格明子受 Pearl 涡旋的排斥

Repulsion of a Néel-type skyrmion from a Pearl vortex in thin ferromagnet-superconductor heterostructures

该研究非微扰分析铁磁-超导异质结构中杂散场导致的斯格明子—涡旋排斥，揭示涡旋磁场增强会抑制排斥并缩短二者平衡距离。

Topological superconductivity with orbital effects in magnetic skyrmion based heterostructures

Proximitizing magnetic textures and $s$-wave superconductors is becoming a platform for engineering topological superconductivity and Majorana fermions by the means of exchange processes. However, the consequences of orbital effects have not yet been fully taken into account. In this work, we investigate the magnetic skyrmion texture-induced orbital effects using a Ginzburg-Landau approach and clarify the conditions under which they can induce superconducting vortices. These orbital effects are then included in Bogoliubov-De-Gennes theory containing the exchange interaction, as well as superco…

超导体-手性铁磁体异质结构中 Pearl 涡旋对 Néel 型斯格明子形状和位置的影响

The Effect of Pearl Vortices on the Shape and Position of Néel-Type Skyrmions in Superconductor-Chiral Ferromagnet Heterostructures

本综述基于解析与数值方法，研究了超导体-手性铁磁体异质结构中超导涡旋对 Néel 型斯格明子形状与位置的影响，预测了半径增大、手性改变及形状改变等效应，并讨论了相关实验。