Influence of the Magnetic Tip on Heterodimers in Electron Spin Resonance Combined with Scanning Tunneling Microscopy
- 주제(키워드) exchange coupling , magnetic tip , heterodimers , electron spin resonance , scanning tunneling microscopy
- 주제(기타) Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Zhang, Xue; Reina-Galvez, Jose; Wolf, Christoph; Wang, Yu; Heinrich, Andreas J.] Inst Basic Sci IBS, Ctr Quantum Nanosci, Seoul 03760, South Korea; [Zhang, Xue; Reina-Galvez, Jose; Wolf, Christoph; Wang, Yu] Ewha Womans Univ, Seoul 03760, South Korea; [Zhang, Xue] South China Univ Technol, Spin X Inst, Sch Microelect, Guangzhou 511442, Peoples R China; [Aubin, Herve] Univ Paris Saclay, Ctr Nanosci & Nanotechnol, CNRS, F-91120 Palaiseau, France; [Heinrich, Andreas J.; Choi, Taeyoung] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000211581
- 본문언어 영어
- Published As https://doi.org/10.1021/acsnano.3c04024
- PubMed 37643247
초록/요약
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.
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