A weakly correlated Fermi liquid state with a small Fermi surface in lightly doped Sr${}_3$Ir${}_2$O${}_7$

Abstract

We characterize the electron doping evolution of (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$ by means of angle-resolved photoemission. Concomitant with the metal insulator transition around $x\approx 0.05$ we find the emergence of coherent quasiparticle states forming a closed small Fermi surface of volume $3x/2$, where $x$ is the independently measured La concentration. The quasiparticle weight $Z$ remains large along the entire Fermi surface, consistent with the moderate renormalization of the low-energy dispersion. This indicates a conventional, weakly correlated Fermi liquid state with a momentum independent residue $Z\approx 0.5$ in lightly doped Sr${}_3$Ir${}_2$O$_7&.

5 pages, 4 figures

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Cited by in corpus (9)

• Square Lattice Iridates
• First-order melting of a weak spin-orbit Mott insulator into a correlated metal
• Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Antiferromagnetic Excitonic Insulator State in Sr3Ir2O7
• Fermi Arcs vs. Fermi Pockets in Electron-doped Perovskite Iridates
• Tuning the electronic structure of Sr2IrO4 thin films by bulk electronic doping using molecular beam epitaxy
• Quasiparticles and charge transfer at the two surfaces of the honeycomb iridate Na${}_2$IrO${}_3$
• Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet
• Many-body effects on the resistivity of a multiorbital system beyond Landau's Fermi-liquid theory