Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 45: Poster Spins on Surfaces at the Atomic Scale

O 45.12: Poster

Tuesday, March 18, 2025, 18:00–20:00, P2

Driving nuclear spin transitions on a single atom using ESR-STM — •Hester Vennema, Cristina Mier Gonzalez, Evert Stolte, Rik Broekhoven, Jinwon Lee, and Sander Otte — Delft University of Technology, The Netherlands

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 [1]. Using the high energy resolution of electron spin resonance (ESR) in combination with the high spatial resolution of scanning tunneling microscopy (STM), it is possible to measure the hyperfine interaction between the nucleus and an electron for single atoms on a surface [2].

A recent effort has successfully resolved the coherent dynamics of a hyperfine-driven interaction between nuclear and electron spin [3]. Moreover, the lifetime of the nuclear spin has been measured to be in the order of seconds [4].

In this study we use a double resonance measurement scheme to resolve nuclear spin transitions of a single 47Ti isotope with a spin of I=5/2. Additionally, we are able to selectively drive multiple transitions directly.

[1] Pla et al. (2013), Nature 496, 334-338

[2] Willke et al. (2018), Science 362, 336-339

[3] Veldman et al. (2024), Nat. Comm. 15, 7951

[4] E. Stolte et al. (2024), arXiv:2410.0870

Keywords: nuclear spins; ESR; STM