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Electric-Field-Driven Spin Resonance by On-Surface Exchange Coupling to a Single-Atom Magnet
Soo-Hyon Phark1,2,3, Hong Thi Bui1,2, Alejandro Ferrón4
1Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul, 03760, Republic of Korea.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 19, 2023
Summary
Researchers demonstrate coherent control of individual spins on surfaces using a novel electron spin resonance (ESR) technique. This method enables addressing and controlling spins without direct tip interaction, paving the way for multi-qubit systems.
Area of Science:
- Quantum physics
- Surface science
- Materials science
Background:
- Coherent control of individual spins on surfaces is crucial for quantum technologies.
- Electron spin resonance (ESR) in scanning tunneling microscopy (STM) has enabled spin manipulation.
- Developing new methods for addressing and controlling multiple spins is an ongoing challenge.
Purpose of the Study:
- To investigate the electron spin resonance (ESR) of a single hydrogenated Ti atom exchange-coupled to a Fe adatom on a surface.
- To demonstrate a new ESR scheme for coherent control of individual spins without direct tip interaction.
- To establish a feasible implementation of spin-based multi-qubit systems on surfaces.
Main Methods:
- Combined experimental and theoretical modeling of ESR using STM.
- Atom manipulation to position a Fe adatom near a hydrogenated Ti atom.
- Continuous wave and pulsed ESR measurements to analyze Rabi rates and spin interactions.
Main Results:
- The ESR of the Ti spin showed two contributions: one from the STM tip and another from the exchange-coupled Fe adatom.
- The Fe contribution to the spin interaction was comparable to the tip's and tunable with a magnetic field.
- The new ESR scheme successfully addressed and coherently controlled individual spins without direct tip magnetic interaction.
Conclusions:
- A novel ESR scheme enables coherent control of individual spins on surfaces.
- This method allows for addressing spins without relying on magnetic interaction with the STM tip.
- The study presents a viable approach for building spin-based multi-qubit systems on surfaces.
Keywords:
Rabi rateatom manipulationelectron spin resonancescanning tunneling microscopysingle spin qubitsingle-atom magnetMore Related Videos
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