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Article Dans Une Revue Chemistry - A European Journal Année : 2017

[OsF6]x-: Molecular Models for Spin-Orbit Entangled Phenomena

Résumé

Heavy 5d elements, like osmium, feature strong spin-orbit interactions which are at the origin of exotic physical behaviors. Revealing the full potential of, for example, novel osmium oxide materials (“osmates”) is however contingent upon a detailed understanding of the local single-ion properties. Herein, two molecular osmate analogues, [OsF6]2@ and [OsF6]@, are reported as model systems for Os4+ and Os5+ centers found in oxides. Using X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) techniques, combined with state-of-the-art ab initio calculations, their ground state was elucidated; mirroring the osmium electronic structure in osmates. The realization of such molecular model systems provides a unique chemical playground to engineer materials exhibiting spin-orbit entangled phenomena.
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Dates et versions

hal-01579618 , version 1 (31-08-2017)

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Kasper S. Pedersen, Daniel N. Woodruff, Saurabh Kumar Singh, Alain Tressaud, Etienne Durand, et al.. [OsF6]x-: Molecular Models for Spin-Orbit Entangled Phenomena. Chemistry - A European Journal, 2017, 23, pp. 11244-11248. ⟨10.1002/chem.201702894⟩. ⟨hal-01579618⟩
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