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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number012143
JournalJournal of Physics: Conference Series
Volume273
Issue number1
DOIs
Publication statusPublished - 2011
Externally publishedYes

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insulators
orbits
oxides
orbitals
anisotropy
metals
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Variational monte carlo study of two-dimensional strong spin-orbit coupling system : Novel mott insulating state in Ir oxide. / Watanabe, Hiroshi; Shirakawa, Tomonori; Yunoki, Seiji.

In: Journal of Physics: Conference Series, Vol. 273, No. 1, 012143, 2011.

Research output: Contribution to journalArticle

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