Abstract
In recent years a variety of exotic quantum phases and unconventional magnetic properties have been predicted as well as realized in heavy 5d transition metal oxides, especially in iridates. Iridate oxides having honeycomb lattices such as ZnIrO3 and MgIrO3 have been previously reported to have a ground state jeff = 1/2 mott and can be easily explained by Kitaev model. While the experimental results on similar iridate oxide CdIrO3 do not show the Jeff = 1/2 mott state and display a substantial combination of Jeff = 1/2 and Jeff = 3/2 states, which makes it diverge from the Kitaev model. In the present work, we have theoretically investigated the trigonal distortion to study the overlap of Jeff = 1/2 and Jeff = 3/2 states present in the iridium states and the impact of spin–orbit coupling on the iridium states in CdIrO3. In addition to substantial trigonal distortion, we found that spin–orbit coupling open a band gap at Fermi level.
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