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.

该项目的主要挑战将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，以便详细研究和理解磁塞贝克隧道中涉及的微观细节。聚焦激光束，我们只会非常局部地加热自旋极化STM的探针尖端，使系统的其余部分（特别是样品）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限定的温度降。使用这种新的方法，我们将研究磁塞贝克隧道从一个磁性STM尖端通过真空势垒到一个单独的纳米磁体和阐述非弹性效应的声子隧穿和定向开关由于热自旋转移扭矩。

项目成果

Magneto-Seebeck tunneling on the atomic scale

• DOI: 10.1126/science.aat7234
• 发表时间: 2019-03-08
• 期刊: SCIENCE
• 影响因子: 56.9
• 作者: Friesen, Cody;Osterhage, Hermann;Krause, Stefan
• 通讯作者: Krause, Stefan

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