J_{eff} Description of the Honeycomb Mott Insulator α-RuCl_{3}.
Phys Rev Lett
; 117(12): 126403, 2016 Sep 16.
Article
em En
| MEDLINE
| ID: mdl-27689287
ABSTRACT
Novel ground states might be realized in honeycomb lattices with strong spin-orbit coupling. Here we study the electronic structure of α-RuCl_{3}, in which the Ru ions are in a d^{5} configuration and form a honeycomb lattice, by angle-resolved photoemission, x-ray photoemission, and electron energy loss spectroscopy supported by density functional theory and multiplet calculations. We find that α-RuCl_{3} is a Mott insulator with significant spin-orbit coupling, whose low energy electronic structure is naturally mapped onto J_{eff} states. This makes α-RuCl_{3} a promising candidate for the realization of Kitaev physics. Relevant electronic parameters such as the Hubbard energy U, the crystal field splitting 10 Dq, and the charge transfer energy Δ are evaluated.
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MEDLINE
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En
Ano de publicação:
2016
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Article