手性磁体-超导体异质结构中的斯格明子-（反）涡旋耦合

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

作者信息

Petrović A P, Raju M, Tee X Y, Louat A, Maggio-Aprile I, Menezes R M, Wyszyński M J, Duong N K, Reznikov M, Renner Ch, Milošević M V, Panagopoulos C

机构信息

Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore.

Department of Physics, Technion, Haifa 32000, Israel.

出版信息

Phys Rev Lett. 2021 Mar 19;126(11):117205. doi: 10.1103/PhysRevLett.126.117205.

DOI:10.1103/PhysRevLett.126.117205

PMID:33798341

Abstract

We report experimental coupling of chiral magnetism and superconductivity in [IrFeCoPt]/Nb heterostructures. The stray field of skyrmions with radius ≈50 nm is sufficient to nucleate antivortices in a 25 nm Nb film, with unique signatures in the magnetization, critical current, and flux dynamics, corroborated via simulations. We also detect a thermally tunable Rashba-Edelstein exchange coupling in the isolated skyrmion phase. This realization of a strongly interacting skyrmion-(anti)vortex system opens a path toward controllable topological hybrid materials, unattainable to date.

摘要

我们报道了在[铱铁钴铂]/铌异质结构中手性磁性与超导性的实验耦合。半径约为50纳米的斯格明子的杂散场足以在25纳米厚的铌薄膜中形成反涡旋，在磁化强度、临界电流和磁通动力学方面具有独特特征，这一点通过模拟得到了证实。我们还在孤立的斯格明子相中检测到了热可调的 Rashba-Edelstein 交换耦合。这种强相互作用的斯格明子 - （反）涡旋系统的实现为可控拓扑混合材料开辟了一条道路，这是迄今为止无法实现的。