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

Kasper S. Pedersen, Daniel N. Woodruff, Saurabh Kumar Singh, Alain Tressaud, Etienne Durand, Mihail Atanasov, Panagiota Perlepe, Katharina Ollefs, Fabrice Wilhelm, Corine Mathonière, Frank Neese, Andrei Rogalev, Jesper Bendix, Rodolphe Clérac

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)11244-11248
Number of pages5
JournalChemistry - A European Journal
Volume23
Issue number47
DOIs
StatePublished - Aug 22 2017

Bibliographical note

Funding Information:
The authors thank E. Lebraud, S. Exiga, M. Rouzi?res, and P. Voisin for technical and experimental assistance. The X-ray spectroscopy experiments were performed at the European Synchrotron Radiation Facility (ESRF, Grenoble, France). K.S.P. and R.C. thank the Danish Research Council for Independent Research for a DFF-Sapere Aude Research Talent grant (4090-00201), the University of Bordeaux, the R?gion Nouvelle Aquitaine, the CNRS and the GdR MCM-2: Magn?tisme et Commutation Mol?culaires.

Keywords

  • 5d elements
  • X-ray spectroscopy
  • ab initio calculations
  • magnetism
  • osmium
  • spin-orbit interaction

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