Theoretical study of Jeff = 1/2 Mott insulator in Ir oxides: A strong spin-orbit coupling vs local electron correlations

Tomononri Shirakawa*, Hiroshi Watanabe, Seiji Yunoki

*この研究の対応する著者

研究成果査読

2 被引用数 (Scopus)

抄録

The variational cluster approximation (VCA) is used to study the nature of a novel Mott insulator induced by a strong spin-orbit coupling along with moderate electron interactions for a two-dimensional three-band Hubbard model, consisting of the t2g manifold of 5d orbitals, with five electrons (i.e., one hole) per site. To extend the variational space, we introduce a generalized local Kramer's doublet as a variational state for VCA We find that the Hund's coupling induces magnetic anisotropy and stabilizes in-plane antiferromagnetic order constructed by the Kramer's doublet. By carefully analyzing the expectation values of the generalized Kramer's double operator, we also find that the local hole state in the Mott insulator is comparable to the Kramer's doublet with Jeff = |S - L| =1/2.

本文言語English
論文番号032088
ジャーナルJournal of Physics: Conference Series
400
PART 3
DOI
出版ステータスPublished - 2012
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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