2021/03/04 by Véronique Brouet, V. Brouet, Paul Foulquier +8
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Catalysis #Chemistry #Condensed matter physics #Coupling (piping) #Crystallography #Doping #Electronic and Structural Properties of Oxides #Electronic structure #Iridium #Magnetic and transport properties of perovskites and related materials #Materials science #Metal #Mott insulator #Physics #Transition metal #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.104.l121104
published as Phys. Rev. B 104, 121104 (2021)
arxiv created 2021/03/04 · openalex created_date 2021/03/15 · openalex publication_date 2021/09/03 · arxiv updated 2021/09/08 · openalex updated_date 2026/08/06
One way to induce insulator-to-metal transitions in the spin-orbit Mott insulator Sr2IrO4 is to substitute iridium with transition metals (Ru, Rh). However, this creates intriguing inhomogeneous metallic states, which cannot be described by a simple doping effect. We detail the electronic structure of the Ru-doped case with angle-resolved photoemission and show that, in contrast to Rh, it cannot be connected to the undoped case by a rigid shift. We further identify bands below EF coexisting with the metallic ones that we assign to nonbonding Ir sites. We rationalize the differences between Rh and Ru by a different hybridization with oxygen, which mediates the coupling to Ir and sensitively affects the effective doping. We argue that the spin-orbit coupling does not control either the charge transfer or the transition threshold.