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Influence of the Magnetic Tip on Heterodimers in Electron Spin Resonance Combined with Scanning Tunneling Microscopy
- Title
- Influence of the Magnetic Tip on Heterodimers in Electron Spin Resonance Combined with Scanning Tunneling Microscopy
- Authors
- Zhang, Xue; Reina-Galvez, Jose; Wolf, Christoph; Wang, Yu; Aubin, Herve; Heinrich, Andreas J.; Choi, Taeyoung
- Ewha Authors
- Andreas Heinrich; 최태영; Christoph Wolf
- SCOPUS Author ID
- Andreas Heinrich; 최태영; Christoph Wolf
- Issue Date
- 2023
- Journal Title
- ACS NANO
- ISSN
- 1936-0851
1936-086X
- Citation
- ACS NANO vol. 17, no. 17, pp. 16935 - 16942
- Keywords
- exchange coupling; magnetic tip; heterodimers; electron spin resonance; scanning tunneling microscopy
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Investigating the quantum properties of individual spins adsorbed on surfaces by electron spin resonance combined with scanning tunneling microscopy (ESR-STM) has shown great potential for the development of quantum information technology on the atomic scale. A magnetic tip exhibiting high spin polarization is critical for performing an ESR-STM experiment. While the tip has been conventionally treated as providing a static magnetic field in ESR-STM, it was found that the tip can exhibit bistability, influencing ESR spectra. Ideally, the ESR splitting caused by the magnetic interaction between two spins on a surface should be independent of the tip. However, we found that the measured ESR splitting of a metal atom-molecule heterodimer can be tip-dependent. Detailed theoretical analysis reveals that this tip-dependent ESR splitting is caused by a different interaction energy between the tip and each spin of the heterodimer. Our work provides a comprehensive reference for characterizing tip features in ESR-STM experiments and highlights the importance of employing a proper physical model when describing the ESR tip, in particular, for heterospin systems.
- DOI
- 10.1021/acsnano.3c04024
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
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