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O: Fachverband Oberflächenphysik
O 15: Spins on Surfaces at the Atomic Scale II
O 15.5: Vortrag
Montag, 27. März 2023, 16:00–16:15, REC C 213
Ultrafast dynamics of magnetic adatoms on MgO — •Lukas Arnhold1, Daria Sostina2, Nicolaj Betz1, Susanne Baumann1, Philip Willke2, and Sebastian Loth1 — 1University of Stuttgart, Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany — 2Karlsruhe Institute of Technologies, Physikalisches Institut, Karlsruhe, Germany
The utilization of single magnetic atoms as qubits requires detailed understanding of their energy levels and the associated time-scales, ideally also those of excited states. Ever since coherent driving of a single spin in the junction of a scanning tunneling microscope has been shown [1], the technique of ESR-STM has been established and used for example to perform qubit operations, as well as, to address multiple qubits [2]. Besides the technique of electron spin resonance, quantum stochastic resonance measurements offer new insights into a system's energy transition cycles, or in other words, it's associated time-scales [3]. Applying this measurement scheme onto ESR active adatoms on a MgO substrate, gives access to additional manipulation pathways and allows for further understanding and mastery of coherent spin manipulation.
[1] Baumann, Susanne et al. 'Electron paramagnetic resonance of individual atoms on a surface.' Science 350 (2015): 417 - 420.
[2] Phark, Soo-Hyon et al. 'Double Electron Spin Resonance of Engineered Atomic Structures on a Surface.' arXiv:2108.09880, 2021.
[3] Haenze, Max et al. 'Quantum Stochastic Resonance of individual Fe atoms.' Sci. Adv. Vol 7, Issue 33 (2021).