Interface stabilized skyrmions in oxide structures for skyrmionics

手性磁体是一类令人兴奋的拓扑物质，它含有局域和拓扑保护的涡旋状磁性织构，称为Skyrmions，目前正作为信息存储和处理的实体受到密切关注。到目前为止，社区的主要关注点是金属块体、薄膜和薄膜系统。在这个方案中，我们重点讨论了金属界面上的氧化和氧化物，以及天电子学中的全氧化物界面。氧化物界面因其对电场的响应、低欧姆损耗和磁阻尼力、厚度依赖性、界面对称性的多样性、氧化引起的可调性以及预期的各向异性Dzyaloshinskii-Moriya相互作用而提供了新的视角，并为反铁和受挫非共面磁体中的Skyrmions开辟了一条自然的路线。利用密度泛函计算与包含海森堡相互作用、Dzyaloshinskii-Moriya相互作用以及磁各向异性和偶极相互作用的广义自旋晶格模型和微磁性相结合的三管齐下的标度桥方法，我们探索了具有容纳天子势的界面的材料组合，研究了它们的相图、稳定性和动力学，它们的大小随外加磁场、电场和温度的变化而变化。为了记忆的目的，我们研究了控制Skyrmions大小的最佳参数。

Chiral magnets are an exciting class of topological matter harboring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently under intense scrutiny as an entity for information storage and processing. The main focus of the community so-far was and is on metallic bulk, film and thin-film systems. In this proposal, we focus on the oxidation and oxides at interfaces with metals and all-oxide interfaces for skyrmionics. Oxide interfaces offer a new perspective due to their response to electric fields, low ohmic losses and magnetic damping, thickness dependence, variety of interface symmetry, tunability due to oxidization and prospective anisotropic Dzyaloshinskii-Moriya interaction providing the perspective of coexistence of skyrmions and antiskyrmions, and open a natural route for skyrmions in antiferro- and frustrated non-coplanar magnets. Using a three-pronged scale-bridging approach combining density functional calculations with a generalized spin-lattice model containing the Heisenberg and the Dzyaloshinskii-Moriya interaction as well as the magnetic anisotropy and the dipolar interaction, with micromagnetism, we explore materials combinations for interfaces that offer great potentials for hosting skyrmions, investigate their phase diagram, stability and dynamics, their size as a function of external magnetic and electric fields and temperature. We study optimal parameters for manipulating the skyrmions size for memristive purpose.