TY - JOUR
T1 - Variational monte carlo study of two-dimensional strong spin-orbit coupling system
T2 - Novel mott insulating state in Ir oxide
AU - Watanabe, Hiroshi
AU - Shirakawa, Tomonori
AU - Yunoki, Seiji
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/273/1/012143
DO - 10.1088/1742-6596/273/1/012143
M3 - Article
AN - SCOPUS:79960705389
SN - 1742-6588
VL - 273
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012143
ER -