Magneto-Seebeck Tunneling Across a Vacuum Barrier

• Applicant: Dr. Stefan Krause
• Subject Area: Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: from 2014 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 257679940

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.

• DFG Programme: Priority Programmes
• Subproject of: SPP 1538: Spin Caloric Transport (SpinCaT)