Variational monte carlo study of two-dimensional strong spin-orbit coupling system: Novel mott insulating state in Ir oxide

Hiroshi Watanabe*, Tomonori Shirakawa, Seiji Yunoki

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Motivated by the novel 5d Mott insulator Sr2IrO4, we have studied the three-orbital Hubbard model with a spin-orbit coupling (SOC) term in a two-dimensional square lattice. We have found the transition from a paramagnetic metal to an antiferromagnetic (AF) insulator at U = UMI. A large SOC, which is characteristic of 5d electron systems, greatly reduces UMI and even small U can lead the system into the Mott insulator. Moreover, the Hund's coupling induces the anisotropy and stabilizes the in-plane AF order. These mechanisms are considered to be valid for Sr 2IrO4.

本文言語English
論文番号012143
ジャーナルJournal of Physics: Conference Series
273
1
DOI
出版ステータスPublished - 2011
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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