Article Dans Une Revue ACS Applied Materials & Interfaces Année : 2018

Linking Electronic Transport through a Spin Crossover Thin Film to the Molecular Spin State Using X-ray Absorption Spectroscopy Operando Techniques

Daniel Lacour
Alberto Riminucci
  • Fonction : Auteur
Benoit Gobaut
Fadi Choueikani
Edwige Otero
Philippe Ohresser

Résumé

One promising route toward encoding information is to utilize the two stable electronic states of a spin crossover molecule. Although this property is clearly manifested in transport across single molecule junctions, evidence linking charge transport across a solid-state device to the molecular film's spin state has thus far remained indirect. To establish this link, we deploy materials-centric and device-centric operando experiments involving X-ray absorption spectroscopy. We find a correlation between the temperature dependencies of the junction resistance and the Fe spin state within the device's [Fe(H 2 B(pz) 2) 2 (NH 2-phen)] molecular film. We also factually observe that the Fe molecular site mediates charge transport. Our dual operando studies reveal that transport involves a subset of molecules within an electronically heterogeneous spin crossover film. Our work confers an insight that substantially improves the state-of-the-art regarding spin crossover-based devices, thanks to a methodology that can benefit device studies of other next-generation molecular compounds.

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hal-02944015 , version 1 (28-02-2025)

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Filip Schleicher, Michał Studniarek, Kuppusamy Senthil Kumar, Etienne Urbain, Kostantine Katcko, et al.. Linking Electronic Transport through a Spin Crossover Thin Film to the Molecular Spin State Using X-ray Absorption Spectroscopy Operando Techniques. ACS Applied Materials & Interfaces, 2018, 10 (37), pp.31580-31585. ⟨10.1021/acsami.8b11495⟩. ⟨hal-02944015⟩
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