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Origin of the different electronic structure of Rh- and Ru-doped Sr2IrO4
- Source :
- Phys. Rev. B 104, 121104 (2021)
- Publication Year :
- 2021
-
Abstract
- 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, contrary to Rh, it cannot be connected to the undoped case by a rigid shift. We further identify bands below $E_F$ coexisting with the metallic ones that we assign to non-bonding 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 neither the charge transfer nor the transition threshold.
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 104, 121104 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2103.03056
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.104.L121104