Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 70: Poster: Spins on Surfaces & Surface Magnetism
O 70.11: Poster
Mittwoch, 20. März 2024, 18:00–20:00, Poster C
Simulation of the nuclear spin state switching driven by ESR in STM — •Hester Vennema1, Rik Broekhoven1, Evert Stolte1, Esther Teng1, Jinwon Lee1, Philip Willke2, and Sander Otte1 — 1Delft University of Technology, Delft, The Netherlands — 2Karlsruhe Institute of Technology, Karlsruhe, Germany
The spin of a single nucleus is a prime candidate for quantum information applications due to its weak coupling to the environment and subsequently longer coherence times. Using the high energy resolution of in combination with the high spatial resolution of STM, it is possible to measure the hyperfine interaction between the nucleus and an electron for single atoms on a surface. A recent effort has been proven successful to resolve the coherent dynamics of a hyperfine driven interaction between nucleus and electron spin.
In our latest experiment, we have observed nuclear spin switching in real time of a 49Ti isotope (I = 7/2) on MgO/Ag(100). The electron spin is continuously driven by a constant RF voltage and interacts with the nucleus by hyperfine interaction. In this work, we demonstrate a model to gain insight in the seen dynamics. Particularly, we are interested in the effect on the nuclear spin dwell time when driving the electron spin slightly off resonance. Combining open system dynamics for two coupled spins, and an intuitive simulation of the experiment, we gain insight in the interaction of the electron and the nucleus. This could lead to understanding dominant relaxation processes and improving conditions to increase the lifetime of the nuclear spin.
Keywords: Scanning Tunneling Microscopy; Electron Spin Resonance; Nuclear spin lifetime; Simulation; Hyperfine interaction