Electronic structure of 5d transition-metal compounds

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    Abstract

    In this contribution, we describe fundamental electronic structures and spin-charge-orbital orderings of 5d transition-metal compounds. By reviewing photoemission spectroscopy studies on CuIr2S4, IrTe2, Cs2Au2Br6, and AuTe2, we discuss the difference between the t 2g and e g systems with respect to the spin-orbit splitting versus the Jahn-Teller splitting. In contrast to the Ir oxides with Mott-Hubbard character, the smallness of the charge-transfer energy plays essential roles in the exotic spin-charge-orbital orderings of the Ir and Au chalcogenides and halides. In particular, the Te 5p hole provides an interesting interplay between the charge-orbital order and the spin-orbit interaction in IrTe2.

    Original languageEnglish
    JournalJournal of Electron Spectroscopy and Related Phenomena
    DOIs
    Publication statusAccepted/In press - 2015

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    Keywords

    • 5d Transition-metal compounds
    • Photoemission spectroscopy
    • Spin-charge-orbital order
    • Spin-orbit interaction

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Physical and Theoretical Chemistry
    • Spectroscopy
    • Condensed Matter Physics
    • Atomic and Molecular Physics, and Optics
    • Radiation

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