@article{2bc5cba5ac6241ba94d7188b9308cca8,
title = "Magnetic states in quasi-2-D iridium oxides with large spin-orbit coupling",
abstract = "The magnetic states in the novel K2NiF4-type quasi-2-D spin-orbit-induced Mott insulator Ba2IrO4 was studied using magnetic susceptibility, muon spin rotation (μSR), and high-pressure resistivity measurements. In Ba2IrO4, a N{\'e}el ordered state was found to be stabilized at temperatures below T N (N{\'e}el temperature) ∼ 240 K. The critical exponent β ∼ 0.18 suggests a quasi-2-D Heisenberg antiferromagnetic state on the IrO2 planar square lattice. The magnetic moment is significantly reduced to ∼0.34 μB/Ir-atom, probably due to a low-dimensional quantum spin fluctuation with a large magnetic intra-plane correlation {pipe}J{pipe}. A non-Fermi liquid-like behavior with carrier scattering due to the spin fluctuation was observed in the metallic state under high pressures of more than 13.8 GPa.",
keywords = "Iridates, M-I transition, Mott insulator, Non-Fermi liquid, Spin-orbit interaction",
author = "Masaaki Isobe and Hirotaka Okabe and Jun Akimitsu",
note = "Funding Information: We thank Drs. Koda, Takeshita, Hiraishi, and Miyazaki, and Profs. Kadono and Miyake (Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)) for the µSR experiments, and Dr. Takeshita (National Institute of Advanced Industrial Science and Technology (AIST)) for the high-pressure resistivity measurements. This work was partly supported by the Advanced Superconducting Materials Research Project of National Institute for Materials Science (NIMS), administrated by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.",
year = "2013",
month = aug,
doi = "10.3938/jkps.63.394",
language = "English",
volume = "63",
pages = "394--397",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "3",
}