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

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.

在这个项目中，我们的目标是使用多探针自旋极化扫描隧道显微镜（SP-STM）的原子尺度的skyrmions与横向自旋极化表面电流相互作用的实验研究。我们将专注于skyrmions的Dzyaloshinskiiii-Moriya相互作用之间的界面稳定的重元素单晶表面上的外延生长制备的只有几个原子层的磁性薄膜。两个扫描探针尖端将被用作接触，用于在磁条内控制产生局部自旋极化电流。Skyrmion晶格和个别skyrmion的横向自旋极化电流的影响将在真实空间中进行调查，通过SP-STM，使用隧道磁探针尖，位于接触尖端之间。这些实验将在超真空条件下进行，温度在1 K到100 K之间变化（最终达到室温），外部磁场高达3 T。样品将在真空中制备，从而实现高纯度的磁性薄膜以及磁性薄膜和基底之间的良好定义的均匀界面。