Electric-Field-Driven Spin Resonance by On-Surface Exchange Coupling to a Single-Atom Magnet
- 주제(키워드) atom manipulation , electron spin resonance , Rabi rate , scanning tunneling microscopy , single spin qubit , single-atom magnet
- 등재 SCIE, SCOPUS
- OA유형 All Open Access; Gold Open Access; Green Open Access
- 발행기관 John Wiley and Sons Inc
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000211720
- 본문언어 영어
- Published As https://doi.org/10.1002/advs.202302033
- PubMed 37466177
초록/요약
Coherent control of individual atomic and molecular spins on surfaces has recently been demonstrated by using electron spin resonance (ESR) in a scanning tunneling microscope (STM). Here, a combined experimental and modeling study of the ESR of a single hydrogenated Ti atom that is exchange-coupled to a Fe adatom positioned 0.6–0.8 nm away by means of atom manipulation is presented. Continuous wave and pulsed ESR of the Ti spin show a Rabi rate with two contributions, one from the tip and the other from the Fe, whose spin interactions with Ti are modulated by the radio-frequency electric field. The Fe contribution is comparable to the tip, as revealed by its dominance when the tip is retracted, and tunable using a vector magnetic field. The new ESR scheme allows on-surface individual spins to be addressed and coherently controlled without the need for magnetic interaction with a tip. This study establishes a feasible implementation of spin-based multi-qubit systems on surfaces. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.
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