Uncovering the Superlattice Structure of Calcium Iridium Oxide at Phase Transition

2021-7-9

JPS Hot Topics 1, 042

https://doi.org/10.7566/JPSHT.1.042

This article is on

First Observation of Superlattice Reflections in the Hidden Order at 105 K of Spin-Orbit Coupled Iridium Oxide Ca₅Ir₃O₁₂
(JPSJ Editors' Choice)

Hiroki Hanate, Takumi Hasegawa, Satoru Hayami, Satoshi Tsutsui, Shoya Kawano, and Kazuyuki Matsuhira
J. Phys. Soc. Jpn. 90, 063702 (2021) .

Order parameter of non-magnetic phase transition at 105 K, which is called "hidden order", was revealed in spin-orbit coupled iridate Ca₅Ir₃O₁₂. This discover of order parameter with rotational and directional degrees of freedom in atomic scale will lead to development of energy saving devices with a fast cross-correlated response.