Magneto-Seebeck Tunneling Across a Vacuum Barrier

跨越真空屏障的磁塞贝克隧道

• 批准号: 257679940
• 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: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/257679940?language=en
• 关键词: Magneto; Seebeck; Tunneling; Across; Vacuum

The main challenge of this project will be the realization of an experimental setup for a "magneto-Seebeck scanning tunneling microscope" ("magneto-Seebeck STM") under ultra-high vacuum conditions that allows for a detailed study and understanding of the microscopic details involved in the magneto-Seebeck tunneling. Focusing a laser beam we will only heat the probe tip of a spin-polarized STM very locally, leaving the rest of the system (especially the sample) unaffected by the external heating. This selective heating will generate a defined temperature drop between the magnetic probe tip and the magnetic sample. Using this new approach we will study the magneto-Seebeck tunneling from a magnetic STM tip through a vacuum barrier into an individual nanomagnet and elaborate inelastic effects in terms of phonon tunneling and directed switching due to thermal spin-transfer torque.

该项目的主要挑战是在超高真空条件下实现“磁塞贝克扫描隧道显微镜”（“磁塞贝克STM”）的实验装置，以便对微观细节进行详细研究和理解参与磁塞贝克隧道效应。聚焦激光束，我们只会非常局部地加热自旋偏振 STM 的探针尖端，使系统的其余部分（尤其是样品）不受外部加热的影响。这种选择性加热将在磁性探针尖端和磁性样品之间产生规定的温降。使用这种新方法，我们将研究从磁性 STM 尖端通过真空势垒进入单个纳米磁体的磁塞贝克隧道效应，并详细阐述由于热自旋转移扭矩导致的声子隧道效应和定向切换方面的非弹性效应。

项目成果

Magneto-Seebeck tunneling on the atomic scale

原子尺度的磁塞贝克隧道效应

• DOI: 10.1126/science.aat7234
• 发表时间: 2019-03-07
• 期刊: Science
• 影响因子: 56.9
• 作者: C. Friesen;Hermann Osterhage;Johannes Friedlein;A. Schlenhoff;R. Wiesendanger;S. Krause
• 通讯作者: S. Krause

Scanning Seebeck tunneling microscopy

扫描塞贝克隧道显微镜

• DOI: 10.1088/1361-6463/aacfab
• 发表时间: 2018
• 期刊: Journal of Physics D: Applied Physics
• 作者: C. Friesen; H. Osterhage; J. Friedlein; A. Schlenhoff; R. Wiesendanger;S. Krause
• 通讯作者: S. Krause