Time-reversal symmetry breaking hidden order in Sr${}_2$(Ir,Rh)O${}_4$

Jaehong Jeong, Yvan Sidis, Alex Louat +2

Layered 5$d$ transition iridium oxides, Sr${}_2$(Ir,Rh)O${}_4$, are described as unconventional Mott insulators with strong spin-orbit coupling. The undoped compound, Sr${}_2$IrO${}_4$, is…