SKM 2023 – scientific programme

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O: Fachverband Oberflächenphysik

O 15: Spins on Surfaces at the Atomic Scale II

O 15.2: Talk

Monday, March 27, 2023, 15:15–15:30, REC C 213

Coherent spin dynamics in a single atom hyperfine system — •Lukas Veldman, Laëtitia Farinacci, Evert Stolte, Mark Canavan, and Sander Otte — TU Delft, Delft, The Netherlands

The combination of electron spin resonance (ESR) with scanning tunneling microscopy (STM) has opened up the possibility to investigate the interaction between electrons and nuclei in individual atoms on a surface [1]. Recently, we showed that for TiH atoms on MgO the hyperfine interaction is highly anisotropic and contains information on the groundstate orbital of the atom [2]. In this work, we go to the low field regime where electron and nuclear states hybridize. We use DC voltage pulses [3] to spin pump both the electron and the nuclear spin [4]. We measure the coherent oscillations of the electron spin driven by the hyperfine interaction. These measurements open the door to controlled spin manipulation of nuclear spins in single atoms.

[1] Willke et al. Science 362 (2018)

[2] Farinacci et al. Nano Letters (2022)

[3] Veldman et al. Science 372 (2021)

[4] Yang et al. Nature Nanotechnology 13 (2018)