Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0\leqx\leq1)

Abstract

Sr2IrO4 is a magnetic insulator driven by spin-orbit interaction (SOI) whereas the isoelectronic and isostructural Sr2RhO4 is a paramagnetic metal. The contrasting ground states have been shown to result from the critical role of the strong SOI in the iridate. Our investigation of structural, transport, magnetic and thermal properties reveals that substituting 4d Rh4+ (4d5) ions for 5d Ir4+(5d5) ions in Sr2IrO4 directly reduces the SOI and rebalances the competing energies so profoundly that it generates a rich phase diagram for Sr2Ir1-xRhxO4 featuring two major effects: (1) Light Rh doping (0\leqx\leq0.16) prompts a simultaneous and precipitous drop in both the electrical resistivity and the magnetic ordering temperature TC, which is suppressed to zero at x = 0.16 from 240 K at x=0. (2) However, with heavier Rh doping (0.24< x<0.85 (\pm0.05)) disorder scattering leads to localized states and a return to an insulating state with spin frustration and exotic magnetic behavior that only disappears near x=1. The intricacy of Sr2Ir1-xRhxO4 is further highlighted by comparison with Sr2Ir1-xRuxO4 where Ru4+(4d4) drives a direct crossover from the insulating to metallic states.

arXiv comment5 figures

References in corpus (10)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4
• Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
• Reduced effective spin-orbital degeneracy and spin-orbital ordering in paramagnetic transition metal oxides: Sr2IrO4 vs. Sr2RhO4
• Coulomb-Enhanced Spin-Orbit Splitting: The Missing Piece in the Sr2RhO4 Puzzle
• Electronic structures of layered perovskite Sr2MO4 (M=Ru, Rh, and Ir)
• Measurement of the internal magnetic field in the correlated iridates Ca${}_4$IrO${}_6$, Ca${}_5$Ir${}_3$O${}_{12}$, Sr${}_3$Ir${}_2$O${}_7$ and Sr${}_2$IrO${}_4$

Cited by in corpus (63)

• Correlated quantum phenomena in the strong spin-orbit regime
• The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
• Evidence of an odd-parity hidden order in a spin-orbit coupled correlated iridate
• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films
• Square Lattice Iridates
• Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4
• Crossover of conduction mechanism in Sr2IrO4 epitaxial thin films
• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• Tuning Magnetic Coupling in Sr${}_2$IrO${}_4$ Thin Films with Epitaxial Strain
• Time-reversal symmetry breaking hidden order in Sr${}_2$(Ir,Rh)O${}_4$
• Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping
• Theoretical study of insulating mechanism in multi-orbital Hubbard models with a large spin-orbit coupling: Slater versus Mott scenario in Sr${}_2$IrO${}_4$
• Interplay of many-body and single-particle interactions in iridates and rhodates
• Structure symmetry determination and magnetic evolution in $\mathrm{S}{\mathrm{r}}_2\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{R}{\mathrm{h}}_{\mathrm{x}}{\mathrm{O}}_4$
• Spin-orbit-controlled metal-insulator transition in Sr${}_2$IrO${}_4$
• Decoupling of the Antiferromagnetic and Insulating States in Tb doped Sr2IrO4
• Crystal growth and intrinsic magnetic behavior of Sr${}_2$IrO${}_4$
• Structural, Magnetic, and Electrical Properties of Li2Ir1-xRuxO3
• The Jeff=1/2 antiferromagnet Sr2IrO4: A golden avenue toward new physics and functions
• From Jeff=1/2 insulator to p-wave superconductor in single-crystal Sr2Ir1-xRuxO4 (0 < x< 1)
• Electron and hole doping in the relativistic Mott insulator Sr${}_2$IrO${}_4$: a first-principles study using band unfolding technique
• Effect of Cu${}^{2+}$ substitution in Spin-Orbit Coupled Sr${}_2$Ir${}_{1-x}$Cu${}_x$O${}_4$: Structure, magnetism and electronic properties
• $J_{eff}=1/2$ Mott Insulating State in Rh and Ir Fluorides
• Dual gate control of bulk transport and magnetism in the spin-orbit insulator Sr2IrO4
• Formation of an incoherent metallic state in Rh-doped Sr${}_2$IrO${}_4$
• Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4
• Bond Directional Anapole Order in a Spin-Orbit Coupled Mott Insulator Sr${}_2$(Ir${}_{1-x}$Rh${}_x$)O${}_4$
• Fragile magnetic order in the honeycomb lattice Iridate Na${}_2$IrO${}_3$ revealed by magnetic impurity doping
• Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure
• Epitaxial Ba2IrO4 thin-films grown on SrTiO3 substrates by pulsed laser deposition
• Impurity-induced phonon thermal Hall effect in the antiferromagnetic phase of Sr2IrO4
• Non-local Coulomb correlations in pure and electron-doped ${\mathrm{Sr}}_2{\mathrm{IrO}}_4$: spectral functions, Fermi surface and pseudogap-like spectral weight distributions from oriented cluster dynamical mean field theory
• Structural evolution and electronic properties of (Sr1-xCax)2-yIrO4+z spin-orbit assisted insulators
• Tuning the electronic structure of Sr2IrO4 thin films by bulk electronic doping using molecular beam epitaxy
• Persistent large anisotropic magnetoresistance and insulator to metal transition in spin-orbit coupled antiferromagnets Sr2(Ir1-xGax)O4
• Spin-orbit driven magnetic insulating state with $J_{\mathrm{eff}}=1/2$ character in a 4d oxide
• Magnetic excitations in hole-doped Sr2IrO4: A comparison with electron-doped cuprates
• Calculating branching ratio and spin-orbit coupling from first-principles: A formalism and its application to iridates
• Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr${}_2$Ir${}_{1-x}$Rh${}_x$O${}_4$
• Crystal structure and physical properties of the Sr-vacant spin-orbit-coupling induced Mott insulator Sr2-xIrO4
• Unusual slow magnetic fluctuations and critical slowing down in Sr${}_2$Ir${}_{1-x}$Rh${}_x$O${}_4$
• Towards Electrical-Current Control of Quantum States in Spin-Orbit-Coupled Matter
• Percolative Mott insulator-metal transition in doped Sr${}_2$IrO${}_4$
• Evolution of Magnetism in Single-Crystal Ca2Ru1-xIrxO4 (0< x <0.65)
• Metal-Insulator Transitions and non-Fermi Liquid Behaviors in 5d Perovskite Iridates
• Magnetism and electrical transport in Y-doped layered iridate Sr${}_2$IrO${}_4$
• Doping driven structural distortion in the bilayer iridate (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Decoupling of magnetism and electric transport in single-crystal (Sr1-xAx)2IrO4 (A = Ca or Ba)
• Hallmarks of the Mott-Metal Crossover in the Hole Doped J=1/2 Mott insulator Sr2IrO4
• Coherent and incoherent bands in La and Rh doped Sr3Ir2O7
• Ground state tuning of the metal-insulator transition by compositional variations in BaIr1-xRuxO3(0<x<1)
• Enhanced Spin-Orbit Coupling in a Correlated Metal
• High-pressure synthesis of Ba${}_2$RhO${}_4$, a rhodate analogue of the layered perovskite Sr-ruthenate
• Anomalous orbital moment in the ferromagnetic phase of the Sr4Ru3O10
• Magneto-synthesis effect on magnetic order, phonons, and magnons in single-crystal Sr${}_2$IrO${}_4$
• Quantum Criticality in a Layered Iridate
• The "dark phase'' in Sr${}_2$Ir${}_{1-x}$Rh${}_x$O${}_4$ revealed by Seebeck and Hall measurements
• Three-dimensional Stacking of Canted Antiferromagnetism and Pseudospin Current in Undoped Sr${}_2$IrO${}_4$: Symmetry Analysis and Microscopic Model Realization
• Structural origin of the Jeff=1/2 antiferromagnetic phase in Ga-doped Sr2IrO4
• Two dimensional electron gas in the $\delta$-doped iridates with strong spin-orbit coupling: La${}_{\delta }$Sr${}_2$IrO${}_4$
• Fortuitous partners of antiferromagnetic and Mott states in spin-orbit-coupled Sr2IrO4: A study of Sr2Ir1-xMxO4 (M=Fe or Co)
• Orbital-Selective Spin-Orbit Mott Insulator in Fractional Valence Iridate La${}_3$Ir${}_3$O${}_{11}$