Spin‐State Switching of Spin‐Crossover Complexes on Cu(111) Evidenced by Spin‐Flip Spectroscopy

Spin-crossover compounds can be switched between two stable states with different magnetic moments, conformations, electronic, and optical properties, which opens appealing perspectives for technological applications including miniaturization down to the scale of single molecules. Although control of the spin states is crucial their direct identification is challenging in single-molecule experiments. Here we investigate the spin-crossover complex [Fe(HB(1,2,4-triazol-1-yl)<sub>3</sub>)<sub>2</sub>] on a Cu(111) surface with scanning tunneling microscopy and density functional theory calculations. Spin crossover of single molecules in dense islands is achieved via electron injection. Spin-flip excitations are resolved in scanning tunneling spectra in a magnetic field enabling the direct identification of the molecular spin state, and revealing the existence of magnetic anisotropy in the HS molecules.

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Publication Details

Journal
Angewandte Chemie International Edition
Published
2024-08-26
DOI
https://doi.org/10.1002/anie.202411865
Citations
5
Primary Topic
Magnetism in coordination complexes
Type
article
Field-Weighted Citation Impact
0.59

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article

Spin‐State Switching of Spin‐Crossover Complexes on Cu(111) Evidenced by Spin‐Flip Spectroscopy

Manuel Gruber, Alexander Weismann, Karl Ridier, Richard L. Berndt et al.
5 citations
Angewandte Chemie International Edition
Magnetism in coordination complexes
0.59
article

Spin‐State Switching of Spin‐Crossover Complexes on Cu(111) Evidenced by Spin‐Flip Spectroscopy

Manuel Gruber, Alexander Weismann, Karl Ridier, Richard L. Berndt, Sven Johannsen, Roberto Robles
article en
5 citations

Abstract

Spin-crossover compounds can be switched between two stable states with different magnetic moments, conformations, electronic, and optical properties, which opens appealing perspectives for technological applications including miniaturization down to the scale of single molecules. Although control of the spin states is crucial their direct identification is challenging in single-molecule experiments. Here we investigate the spin-crossover complex [Fe(HB(1,2,4-triazol-1-yl)<sub>3</sub>)<sub>2</sub>] on a Cu(111) surface with scanning tunneling microscopy and density functional theory calculations. Spin crossover of single molecules in dense islands is achieved via electron injection. Spin-flip excitations are resolved in scanning tunneling spectra in a magnetic field enabling the direct identification of the molecular spin state, and revealing the existence of magnetic anisotropy in the HS molecules.

Angewandte Chemie International EditionVol. 63(51)
Centre National de la Recherche Scientifique (FR), Université Toulouse III - Paul Sabatier (FR), University of the Basque Country (ES), Université Fédérale de Toulouse Midi-Pyrénées (FR), Christian-Albrechts-Universität zu Kiel (DE), Laboratoire de Chimie de Coordination (FR), Material Physics Center (ES), Donostia International Physics Center (ES), University of Duisburg-Essen (DE)
European Commission, Deutsche Forschungsgemeinschaft, Centre National de la Recherche Scientifique, H2020 Future and Emerging Technologies, HORIZON EUROPE European Innovation Council
Openalex Percentile: Top 40%
Magnetism in coordination complexes
0.59
DOIOpen Access PDFOpenAlex
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