TY - JOUR
T1 - Variational Monte Carlo study for the insulating mechanism of Sr 2IrO4
T2 - From the viewpoint of energy gain
AU - Watanabe, Hiroshi
AU - Shirakawa, Tomonori
AU - Yunoki, Seiji
PY - 2013
Y1 - 2013
N2 - To examine the insulating mechanism of a novel 5d-electron system Sr 2IrO4, we study the ground state properties of a three-orbital Hubbard model using a variational Monte Carlo method. We find that the insulating state in the ground state phase diagram shows crossover behavior from a weakly-correlated to a strongly-correlated antiferromagnetic state. This crossover is characterized by the different mechanisms of the insulating state, i.e., changing from an interaction-energy driven insulator to a band-energy driven insulator with increasing the interaction. We discuss that Sr 2IrO4 is located around this crossover region and displays an anomalous behavior.
AB - To examine the insulating mechanism of a novel 5d-electron system Sr 2IrO4, we study the ground state properties of a three-orbital Hubbard model using a variational Monte Carlo method. We find that the insulating state in the ground state phase diagram shows crossover behavior from a weakly-correlated to a strongly-correlated antiferromagnetic state. This crossover is characterized by the different mechanisms of the insulating state, i.e., changing from an interaction-energy driven insulator to a band-energy driven insulator with increasing the interaction. We discuss that Sr 2IrO4 is located around this crossover region and displays an anomalous behavior.
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U2 - 10.1088/1742-6596/454/1/012047
DO - 10.1088/1742-6596/454/1/012047
M3 - Article
AN - SCOPUS:84885620988
SN - 1742-6588
VL - 454
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012047
ER -