Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 47: Focus Session: Atomic-Scale Studies of Spins on Surfaces with Scanning Tunneling Microscopy 1
O 47.7: Vortrag
Mittwoch, 7. September 2022, 17:00–17:15, S051
Controlled migration of a coherent spin excitation through atomically assembled nanomagnets — •Lukas Veldman1, Laëtitia Farinacci1, Rasa Rejali1, Rik Broekhoven1, Jeremie Gobeil1, David Coffey1, Markus Ternes2,3, and Sander Otte1 — 1TU Delft, Delft, The Netherlands — 2RWTH Aachen, Aachen, Germany — 3Forschungszentrum Jülich, Jülich, Germany
Tracing single coherent spin excitations in low dimensional nanomagnets has been a long standing goal in experimental solid state physics. Scanning tunneling microscopy offers a promising platform to chase this goal due to its capability to build nanomagnets atom-by-atom and address each atomic spin individually. Here, we show the possibility of inducing a single spin-flip excitation using electron scattering and the measurement of the resulting flip-flop interaction between two atomic spins [1]. Next, we use the same principle to observe coherent spin dynamics in multiple atomically assembled nanomagnets. By tuning the interaction between tip and nanomagnet, we are able to address different magnetic resonances in each atomic structure. In engineered branched structures, the spin excitation can be sent to different directions using the tip interaction. These techniques can serve as a platform for dynamical quantum simulation and can form a foundation for atomically assembled spintronic applications.
[1] Veldman, L. M., Farinacci, L., Rejali, R., ... & Otte, A. F. (2021) Science, 372