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Electron spin resonance of single iron phthalocyanine molecules and role of their non-localized spins in magnetic interactions

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Title
Electron spin resonance of single iron phthalocyanine molecules and role of their non-localized spins in magnetic interactions
Author(s)
Xue Zhang; Christoph Wolf; Yu Wang; Aubin, Hervé; Bilgeri, Tobias; Philip Willke; Andreas J. Heinrich; Taeyoung Choi
Publication Date
2022-01
Journal
Nature Chemistry, v.14, no.1, pp.59 - 65
Publisher
Nature Research
Abstract
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.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. [Figure not available: see fulltext.]
URI
https://pr.ibs.re.kr/handle/8788114/11218
DOI
10.1038/s41557-021-00827-7
ISSN
1755-4330
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > 1. Journal Papers (저널논문)
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