Electronic structure of 5d transition-metal compounds

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• 作者：Takashi Mizokawa ; ^{mizokawa@waseda.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：5d Transition-metal compounds ; Spin&ndash ; orbit interaction ; Spin&ndash ; charge&ndash ; orbital order ; Photoemission spectroscopy
• 刊名：Journal of Electron Spectroscopy and Related Phenomena
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：208
• 期：Complete
• 页码：78-82
• 全文大小：1308 K

文摘

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.