Regensburg 2025 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 24: Poster Scanning Probe Techniques: Method Development

O 24.9: Poster

Montag, 17. März 2025, 18:00–20:00, P2

Lightwave driven magnetic field scanning tunneling microscopy — •Leo Ringer, Andreas Rank, Peter Menden, Christian Meineke, Rupert Huber, and Jascha Repp — University of Regensburg, Regensburg, Germany

Lightwave driven scanning tunneling microscopy (LW-STM) is based on the key idea to directly steer electron tunneling in STM by ultrashort light pulses. Combining the development of LW-STM with a tunable magnetic field would allow following spin dynamics - e.g. spin precession - in molecules and other atomistic structures with single-electron sensitivity. To this end, we develop a novel lightwave driven scanning tunneling microscope including an external magnetic field to resolve single-spin dynamics with atomic spatial and ultrafast temporal resolution. Instrumental challenges of this development will be discussed, and we present the resulting instrument design including the head of the scanning tunneling microscope, the laser source as well as the solution to introduce the laser transient from outside the vacuum system to the tip-sample junction.

Keywords: Scanning tunneling microscopy; Lightwave driven scanning tunneling microscopy; Magnetic Field; Surface Science; Method Developement