Low-energy electrodynamics of Dirac semimetal phases in the doped Mott insulator Sr${}_2$IrO${}_4$

Sun-Woo Kim, Myungjun Kang, Sangmo Cheon

Correlated Dirac semimetal phases emerge in lightly doped (Tb- or La-doped) Mott insulator Sr${}_2$IrO${}_4$, where a d-wave symmetry-breaking order underlying a pseudogap plays a cruc…