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Hyperfine interaction of individual atoms on a surface
Philip Willke1,2,3, Yujeong Bae1,2,3, Kai Yang1
1IBM Almaden Research Center, San Jose, CA 95120, USA.
Science (New York, N.Y.)
|October 20, 2018
Summary
Researchers precisely controlled individual iron and titanium atoms on a surface. They found that the hyperfine interaction, crucial for quantum technologies, depends on atomic arrangement, revealing detailed electronic and nuclear spin properties.
Area of Science:
- Surface science
- Quantum physics
- Atomic-scale engineering
Background:
- Harnessing nuclear spins is key for advanced applications like quantum computing and high-resolution imaging.
- Understanding the atomic-scale environment is critical for controlling nuclear spin properties.
Purpose of the Study:
- To measure and manipulate the hyperfine interaction of individual atoms on a surface.
- To investigate the influence of atomic binding configuration on hyperfine interactions.
- To demonstrate the hyperfine spectrum as a probe for the local chemical environment.
Main Methods:
- Utilized spin-polarized scanning tunneling microscopy (SP-STM).
- Employed single-atom electron spin resonance (SA-ESR).
- Performed atom manipulation techniques to reposition individual atoms.
Main Results:
- Successfully measured and manipulated the hyperfine interaction of individual Fe and Ti atoms on MgO.
- Demonstrated a strong dependence of hyperfine interaction on the atom's binding configuration.
- Extracted atom- and position-specific information on electronic ground states and nuclear spin properties.
Conclusions:
- The hyperfine spectrum serves as a sensitive probe of the chemical environment at the atomic scale.
- Precise control over individual atoms allows for tailored manipulation of their magnetic properties.
- This work advances the understanding and control of quantum phenomena at the atomic level.
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