From Jeff=1/2 insulator to p-wave superconductor in single-crystal Sr2Ir1-xRuxO4 (0 < x< 1)

Abstract

Sr2IrO4 is a magnetic insulator assisted by strong spin-orbit coupling (SOC) whereas the Sr2RuO4 is a p-wave superconductor. The contrasting ground states have been shown to result from the critical role of the strong SOC in the iridate. Our investigation of structural, transport, and magnetic properties reveals that substituting 4d Ru4+ (4d4) ions for 5d Ir4+(5d5) ions in Sr2IrO4 directly adds holes to the t2g bands, reduces the SOC and thus rebalances the competing energies in single-crystal Sr2Ir1-xRuxO4. A profound effect of Ru doping driving a rich phase diagram is a structural phase transition from a distorted I41/acd to a more ideal I4/mmm tetragonal structure near x=0.50 that accompanies a phase transition from an antiferromagnetic-insulating state to a paramagnetic-metal state. We also make a comparison drawn with Rh doped Sr2IrO4, highlighting important similarities and differences.

18 pages,7 figures

References in corpus (9)

• 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
• Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4
• The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
• Robustness of basal-plane antiferromagnetic order and the $J_{eff}=1/2$ state in single-layer iridate spin-orbit Mott insulators
• Coulomb-Enhanced Spin-Orbit Splitting: The Missing Piece in the Sr2RhO4 Puzzle
• Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0\leqx\leq1)
• Electronic structures of layered perovskite Sr2MO4 (M=Ru, Rh, and Ir)
• Evolution of Magnetism in Single-Crystal Ca2Ru1-xIrxO4 (0< x <0.65)

Cited by in corpus (18)

• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Recent progress on correlated electron systems with strong spin-orbit coupling
• Spin-orbit-controlled metal-insulator transition in Sr${}_2$IrO${}_4$
• Decoupling of the Antiferromagnetic and Insulating States in Tb doped Sr2IrO4
• Evolution of structure, magnetism and electronic transport in doped pyrochlore iridate Y${}_2$Ir${}_{2-x}$Ru${}_x$O${}_7$
• Effect of Cu${}^{2+}$ substitution in Spin-Orbit Coupled Sr${}_2$Ir${}_{1-x}$Cu${}_x$O${}_4$: Structure, magnetism and electronic properties
• Structural evolution and electronic properties of (Sr1-xCax)2-yIrO4+z spin-orbit assisted insulators
• Persistent large anisotropic magnetoresistance and insulator to metal transition in spin-orbit coupled antiferromagnets Sr2(Ir1-xGax)O4
• Origin of the different electronic structure of Rh- and Ru-doped Sr2IrO4
• Giant Spin Gap and Magnon Localization in the Disordered Heisenberg Antiferromagnet Sr2Ir1-xRuxO4
• Nonmagnetic substitution in pyrochlore iridate Y${}_2$(Ir${}_{1-x}$Ti${}_x$)${}_2$O${}_7$: Structure, magnetism and electronic properties
• Two-dimensional Peierls instability via zone boundary Dirac line nodes in layered perovskite oxides
• Decoupling of magnetism and electric transport in single-crystal (Sr1-xAx)2IrO4 (A = Ca or Ba)
• Magnetism and electrical transport in Y-doped layered iridate Sr${}_2$IrO${}_4$
• Ground state tuning of the metal-insulator transition by compositional variations in BaIr1-xRuxO3(0<x<1)
• Evolution of the spectral lineshape at the magnetic transition in Sr2IrO4 and Sr3Ir2O7
• Structural origin of the Jeff=1/2 antiferromagnetic phase in Ga-doped Sr2IrO4
• Mixed-pairing superconductivity in 5d Mott insulators with antisymmetric exchange