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Article Dans Une Revue ACS Nano Année : 2023

The Influence of the Magnetic Tip on Heterodimers in ESR-STM

Xue Zhang
Jose Reina-Gálvez
  • Fonction : Auteur
Christoph Wolf
Yu Wang
Hervé Aubin
Andreas J Heinrich
Taeyoung Choi
  • Fonction : Auteur

Résumé

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 tipdependent. 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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Dates et versions

hal-04281456 , version 1 (14-11-2023)

Identifiants

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Xue Zhang, Jose Reina-Gálvez, Christoph Wolf, Yu Wang, Hervé Aubin, et al.. The Influence of the Magnetic Tip on Heterodimers in ESR-STM. ACS Nano, 2023, 17 (17), pp.16935 - 16942. ⟨10.1021/acsnano.3c04024⟩. ⟨hal-04281456⟩
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