First-order melting of a weak spin-orbit Mott insulator into a correlated metal

Abstract

The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)Lax)3Ir2O7 is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regime of nanoscale phase separation comprised of antiferromagnetic, insulating regions and paramagnetic, metallic puddles persisting until x~0.04. Continued electron doping results in an abrupt, first-order phase boundary where the Neel state is suppressed and a homogenous, correlated, metallic state appears with an enhanced spin susceptibility and local moments. As the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state.

arXiv comment5 pages, 4 figures

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Cited by in corpus (31)

• The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
• Square Lattice Iridates
• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator
• Pressure-Induced Confined Metal from the Mott Insulator Sr3Ir2O7
• Structural investigation of the bilayer iridate Sr3Ir2O7
• Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy
• Structural, electronic, and magnetic properties of nearly-ideal $J_{\mathrm{eff}}$ $=$ 1/2 iridium halides
• Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure
• Disordered dimer state in electron-doped Sr${}_3$Ir${}_2$O${}_7$
• Structural evolution and electronic properties of (Sr1-xCax)2-yIrO4+z spin-orbit assisted insulators
• Imaging antiferromagnetic domain fluctuations and the effect of atomic-scale disorder in a doped spin-orbit Mott insulator
• Structural and Magnetic Transitions in the Planar Antiferromagnet Ba${}_4$Ir${}_3$O${}_{10}$
• Response of the lattice across the filling-controlled Mott metal-insulator transition of a rare earth titanate
• Correlated electron metal properties of the honeycomb ruthenate Na${}_2$RuO${}_3$
• Determination of the local structure of Sr${}_{2-x}$M${}_x$IrO${}_4$ (M = K, La) as a function of doping and temperature
• Overdamped antiferromagnetic strange metal state in Sr${}_3$IrRuO${}_7$
• Doping driven structural distortion in the bilayer iridate (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Coherent and incoherent bands in La and Rh doped Sr3Ir2O7
• Polarized Raman spectroscopy study of metallic $(S{r}_{1-x}L{a}_x{)}_{3}I{r}_2{O}_7$: a consistent picture of disorder-interrupted unidirectional charge order
• Electronic and optical properties of La-doped Sr${}_3$Ir${}_2$O${}_7$ epitaxial thin-films
• Sr${}_3$Ir${}_2$O${}_7$F${}_2$: Topochemical conversion of a relativistic Mott state into a spin-orbit driven band insulator
• Superconductivity and Electron Correlations in Kagome Metal LuOs3B2
• Electron doping in ${\text{Sr}}_3{\text{Ir}}_2{\text{O}}_7$: collapse of band gap and magnetic order
• Observation of excitons bound by antiferromagnetic correlations
• Epitaxial growth and antiferromagnetism of Sn-substituted perovskite iridate SrIr${}_{0.8}$Sn${}_{0.2}$O${}_3$
• Critical fluctuations in the spin-orbit Mott insulator Sr${}_3$Ir${}_2$O${}_7$
• Evolution of the spectral lineshape at the magnetic transition in Sr2IrO4 and Sr3Ir2O7
• Putative magnetic quantum criticality in (Sr${}_{\text{1-x}}$La${}_{\text{x}}$)${}_{\text{3}}$Ir${}_{\text{2}}$O${}_{\text{7}}$
• Absence of temperature-dependent phonon anomalies in Sr2IrO4 and Sr3Ir2O7