Atomic-scale skyrmions driven by lateral spin-polarized currents

由横向自旋极化电流驱动的原子尺度斯格明子

• 批准号: 403505835
• 负责人: Dr. Stefan Krause
• 金额: --
• 依托单位: Institut für Nanostruktur- und Festkörperphysik (INF)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/403505835?language=en
• 关键词: Atomic; scale; skyrmions; driven; lateral; Atomic; scale; skyrmions; driven; lateral

Within this project we aim at the experimental investigation of atomic-scale skyrmions interacting with lateral spin-polarized surface currents using multi-probe spin-polarized scanning tunneling microscopy (SP-STM). We will focus on skyrmions that are stabilized by Dzyaloshinskii-Moriya interactions at the interface between ultrathin magnetic films consisting of only a few atomic layers prepared by epitaxial growth on heavy-element single crystal surfaces. Two of the scanning probe tips will be used as contacts for the controlled generation of a local spin-polarized current within a magnetic stripe. Skyrmion lattices and individual skyrmions affected by the lateral spin-polarized current will be investigated in real-space by means of SP-STM, using a tunneling magnetic probe tip that is positioned between the contact tips. The experiments will be performed under ultrahigh vacuum conditions, at variable temperature between 1 K and 100 K (and ultimately up to room temperature), and in variable external magnetic fields of up to 3 T. Samples will be prepared in vacuo, thereby realizing high purity magnetic ultrathin films as well as well-defined homogeneous interfaces between the magnetic film and the substrate.

在该项目中，我们旨在使用多探针自旋扫描隧道显微镜（SP-STM）与侧向自旋表面电流相互作用的原子尺度的天空。我们将专注于由dzyaloshinskii-moriya相互作用稳定的超薄磁性膜之间的稳定的天际，仅由少量的原子层组成，这些原子层是由重型单晶表面上的外延生长制成的。两个扫描探针尖端将用作磁条带内局部自旋极化电流的受控生成的触点。使用隧道磁探针尖端，将在接触尖端之间放置隧道磁探针尖端，以实际空间研究受侧自旋偏振电流影响的Skyrmion晶格和单个Skyrmions。实验将在超高真空条件下，在1 K和100 K之间的可变温度下进行（最终直至室温），在可变的外部磁场中，最多3吨。样品将在真空吸尘器中制备，从而实现高纯度磁性超薄膜以及磁性膜之间的均质均匀互动膜和磁性膜之间。