Iridates from the molecular side

Kasper S. Pedersen (), Jesper Bendix (), Alain Tressaud, Etienne Durand, Høgni Weihe, Zaher Salman, Thorbjørn J Morsing, Daniel N. Woodruff, Yanhua Lan, Wolfgang Wernsdorfer, Corine Mathonière, Stergios Piligkos, Sophia I. Klokishner, Serghei Ostrovsky, Katharina Ollefs, Fabrice Wilhelm, Andrei Rogalev and Rodolphe Clérac ()
Additional contact information
Kasper S. Pedersen: CNRS, CRPP, UPR 8641
Jesper Bendix: University of Copenhagen
Alain Tressaud: CNRS, ICMCB, UPR 9048
Etienne Durand: CNRS, ICMCB, UPR 9048
Høgni Weihe: University of Copenhagen
Zaher Salman: Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut
Thorbjørn J Morsing: University of Copenhagen
Daniel N. Woodruff: University of Oxford
Yanhua Lan: CNRS, Inst NEEL
Wolfgang Wernsdorfer: CNRS, Inst NEEL
Corine Mathonière: CNRS, ICMCB, UPR 9048
Stergios Piligkos: University of Copenhagen
Sophia I. Klokishner: Institute of Applied Physics, Academy of Sciences of Moldova
Serghei Ostrovsky: Institute of Applied Physics, Academy of Sciences of Moldova
Katharina Ollefs: ESRF - The European Synchrotron, CS 40220
Fabrice Wilhelm: ESRF - The European Synchrotron, CS 40220
Andrei Rogalev: ESRF - The European Synchrotron, CS 40220
Rodolphe Clérac: CNRS, CRPP, UPR 8641

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract New exotic phenomena have recently been discovered in oxides of paramagnetic Ir4+ ions, widely known as ‘iridates’. Their remarkable properties originate from concerted effects of the crystal field, magnetic interactions and strong spin-orbit coupling, characteristic of 5d metal ions. Despite numerous experimental reports, the electronic structure of these materials is still challenging to elucidate, and not attainable in the isolated, but chemically inaccessible, [IrO6]8– species (the simplest molecular analogue of the elementary {IrO6}8− fragment present in all iridates). Here, we introduce an alternative approach to circumvent this problem by substituting the oxide ions in [IrO6]8− by isoelectronic fluorides to form the fluorido-iridate: [IrF6]2−. This molecular species has the same electronic ground state as the {IrO6}8− fragment, and thus emerges as an ideal model for iridates. These results may open perspectives for using fluorido-iridates as building-blocks for electronic and magnetic quantum materials synthesized by soft chemistry routes.

Date: 2016
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DOI: 10.1038/ncomms12195

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