Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 21: Focus Session: Spins on Surfaces studied by Atomic Scale Spectroscopies III
O 21.2: Talk
Tuesday, March 19, 2024, 11:00–11:15, MA 004
Coherent spin dynamics between electron and nucleus within a single atom — •Lukas M. Veldman1,2, Evert W. Stolte1, Mark P. Canavan1, Rik Broekhoven1, Philip Willke3, Laëtitia Farinacci1, and Sander Otte1 — 1Delft University of Technology, Delft, The Netherlands — 2University of Stuttgart, Stuttgart, Germany — 3Karlsruhe Institute of Technology, Karlsruhe, Germany
The study of single atom electron spins has led to both fundamental insight into the building blocks of matter as well as shown the tantalizing potential to construct functional magnetic devices atom-by-atom. The nuclear spin forms the next frontier in this effort, offering insight into intra-atomic magnetic interactions while, at the same time, promising prolonged coherence times for coherent quantum operations compared to their electronic counterparts. Here, we present coherent dynamical access to a single nuclear spin by combining electron spin resonance measurements with direct-current pump-probe spectroscopy inside a scanning tunneling microscope. We initialize both spins by means of the spin polarized tunneling electrons and control the resulting dynamics by tuning the amount of entanglement between nuclear and electron spin with the magnetic probe tip. This local spin control provides a pathway towards utilizing single nuclei for dynamic quantum simulation in extended atomic arrays.
Keywords: Scanning Tunneling Microscopy; Electorn Spin Resonance; Nuclear Spin; Pump-probe Spectroscopy