Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 90: Spins on Surfaces at the Atomic Scale II
O 90.8: Vortrag
Donnerstag, 20. März 2025, 16:45–17:00, H11
Single-shot readout of an individual nuclear spin using a scanning tunnelling microscope — •Evert Stolte1, Jinwon Lee1, Hester Vennema1, Rik Broekhoven1, Esther Teng1, Allard Katan1, Lukas Veldman2, Philip Willke3, and Sander Otte1 — 1Department of Quantum Nanoscience, TU Delft — 2Institute for Functional Matter and Quantum Technologies, University of Stuttgart — 3Physikalisches Institut, Karlsruhe Institute of Technology
Nuclear spins owe their long-lived magnetic states to their excellent isolation from the environment. At the same time, a limited degree of interaction with their surroundings is necessary for reading and writing the spin state. Therefore, detailed knowledge of and control over the atomic environment of a nuclear spin is key to optimizing conditions for quantum information applications. Scanning tunnelling microscopy (STM), combined with electron spin resonance (ESR), provides atomic-scale information of individual nuclear spins via the hyperfine interaction. However, STM has thus far only sparingly been used to investigate nuclear spins in the time domain. As such, no nuclear spin lifetimes have yet been reported. Here, we demonstrate single-shot readout of an individual 49Ti nuclear spin with an STM. Employing a pulsed measurement scheme, we find its lifetime to be in the order of seconds. Furthermore, we shed light on the pumping and relaxation mechanisms of the nuclear spin by investigating its response to both ESR driving and tunnelling current. These findings give an atomic-scale insight into the nature of nuclear spin relaxation and are relevant for the development of atomically assembled qubit platforms.
Keywords: STM; ESR-STM; Nuclear spin; Lifetime