Kavli Affiliate: Sander Otte
| First 5 Authors: Evert W. Stolte, Jinwon Lee, Hester G. Vennema, Rik Broekhoven, Esther Teng
| Summary:
Nuclear spins owe their long-lived magnetic states to their excellent
isolation from the environment. At the same time, a finite 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. While various platforms enabled single-shot readout
of nuclear spins, their direct environments were either unknown or impossible
to controllably modify on the atomic scale. Scanning tunnelling microscopy
(STM), combined with electron spin resonance (ESR), provides atomic-scale
information of individual nuclear spins via the hyperfine interaction. Here, we
demonstrate single-shot readout of an individual $^{text{49}}$Ti 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, which is supported by model calculations.
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.
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