Unconventional metallic phases from doped spin-orbit assisted Mott insulators*

The oxides of 4d and 5d transition metals show unique electronic/magnetic behavior due to the interplay between electronic correlation and the spin-orbit coupling as they are comparable to each other. Ruddlesden-Popper iridates [Sr_n+1Ir_nO_3n+1] are such showing large variation in electronic behaviors depending upon value of n. The first two members (n=1 and n=2) i.e. Sr₂IrO₄ and Sr₃Ir₂O₇ host J_eff=1/2 Mott insulating state. It is natural to ask how such insulting states evolve with chemical doping and associated disorder. I will present the evolution of electronic/magnetic properties from insulator to unconventional metal in Sr₃(Ir_1-xRu_x)₂O₇ and (Sr_1-xLa_x)₃Ir₂O₇  along with their  electronic/magnetic phase diagrams.