Electron spin resonance of single iron phthalocyanine molecules and role of their non-localized spins in magnetic interactions
- 주제(기타) Chemistry, Multidisciplinary
- 설명문(일반) [Zhang, Xue; Wolf, Christoph; Wang, Yu; Willke, Philip; Heinrich, Andreas J.; Choi, Taeyoung] Inst Basic Sci IBS, Ctr Quantum Nanosci, Seoul, South Korea; [Zhang, Xue; Wolf, Christoph; Wang, Yu; Willke, Philip] Ewha Womans Univ, Seoul, South Korea; [Aubin, Herve] Univ Paris Saclay, CNRS, Ctr Nanosci & Nanotechnol, Palaiseau, France; [Bilgeri, Tobias] Inst Phys, Ecole Polytech Fed Lausanne, Lausanne, Switzerland; [Willke, Philip] Karlsruhe Inst Technol, Phys Inst, Karlsruhe, Germany; [Heinrich, Andreas J.; Choi, Taeyoung] Ewha Womans Univ, Dept Phys, Seoul, South Korea
- 등재 SCIE, SCOPUS
- OA유형 Green Submitted
- 발행기관 NATURE PORTFOLIO
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000190254
- 본문언어 영어
- Published As https://doi.org/10.1038/s41557-021-00827-7
- PubMed https://pubmed.ncbi.nlm.nih.gov/34764471
초록/요약
Electron spin resonance spectroscopy has traditionally been used to study large ensembles of spins, but its combination with scanning tunnelling microscopy recently enabled measurements on single adatoms. Now, individual iron phthalocyanine complexes adsorbed on a surface have been probed. Their spin distribution partially extends on the phthalocyanine, leading to a strong geometry-dependent exchange coupling interaction. Electron spin resonance (ESR) spectroscopy is a crucial tool, through spin labelling, in investigations of the chemical structure of materials and of the electronic structure of materials associated with unpaired spins. ESR spectra measured in molecular systems, however, are established on large ensembles of spins and usually require a complicated structural analysis. Recently, the combination of scanning tunnelling microscopy with ESR has proved to be a powerful tool to image and coherently control individual atomic spins on surfaces. Here we extend this technique to single coordination complexes-iron phthalocyanines (FePc)-and investigate the magnetic interactions between their molecular spin with either another molecular spin (in FePc-FePc dimers) or an atomic spin (in FePc-Ti pairs). We show that the molecular spin density of FePc is both localized at the central Fe atom and also distributed to the ligands (Pc), which yields a strongly molecular-geometry-dependent exchange coupling.
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