Odd-parity triplet superconductivity in multi-orbital materials with strong spin-orbit coupling: applications to doped Sr2IrO4

Abstract

We explore possible superconducting states in $t_{2g}$ multi-orbital correlated electron systems with strong spin-orbit coupling (SOC). In order to study such systems in a controlled manner, we employ large-scale dynamical mean-field theory (DMFT) simulations with the hybridization expansion continuous-time Quantum Monte Carlo (CTQMC) impurity solver. To determine the pairing symmetry, we go beyond the local DMFT formalism using parquet equations to introduce the momentum dependence in the two-particle vertex and correlation functions. In the strong SOC limit, a singlet, $d$-wave pairing state in the electron-doped side of the phase diagram is observed at weak Hund's coupling, which is triggered by antiferromagnetic fluctuations. When the Hund's coupling is comparable to SOC, a two-fold degenerate, triplet $p$-wave pairing state with relatively high $T_c$ emerges in the hole-doped side of the phase diagram, which is associated with enhanced charge fluctuations. Experimental implications to doped Sr${}_2$IrO${}_4$ are discussed.

5 pages, 5 figures

References in corpus (9)

• Continuous-time Monte Carlo methods for quantum impurity models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Quantum Monte Carlo Impurity Solver for Cluster DMFT and Electronic Structure Calculations in Adjustable Base
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Hybridization expansion impurity solver: General formulation and application to Kondo lattice and two-orbital models
• Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
• The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
• Odd-parity triplet superconductivity in multi-orbital materials with strong spin-orbit coupling: applications to doped Sr2IrO4

Cited by in corpus (28)

• Odd-parity triplet superconductivity in multi-orbital materials with strong spin-orbit coupling: applications to doped Sr2IrO4
• Square Lattice Iridates
• A structural distortion induced magneto-elastic locking in Sr${}_2$IrO${}_4$ revealed through nonlinear optical harmonic generation
• $i$QIST: An open source continuous-time quantum Monte Carlo impurity solver toolkit
• Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling
• J-freezing and Hund's rules in spin-orbit-coupled multiorbital Hubbard models
• Raman scattering study of vibrational and magnetic excitations in Sr${}_{2-x}$La${}_x$IrO${}_4$
• Synthesis and electronic properties of Ruddlesden-Popper strontium iridate epitaxial thin films stabilized by control of growth kinetics
• Unidirectional spin density wave state in metallic (Sr1-xLax)2IrO4
• Dual gate control of bulk transport and magnetism in the spin-orbit insulator Sr2IrO4
• Mott transition in the triangular lattice Hubbard model: a dynamical cluster approximation study
• Model analysis of magnetic susceptibility of Sr${}_2$IrO${}_4$ - 2D $J_{\mathrm{eff}}$ = 1/2 Heisenberg system with competing interlayer couplings
• Spin-orbit-induced exotic insulators in a three-orbital Hubbard model with $(t_{2g}{)}^5$ electrons
• Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4
• Fermi arcs, pseudogap and collective excitations in doped Sr2IrO4: A generalized fluctuation exchange study
• Evidence for spin-triplet odd-parity superconductivity close to type-II van Hove singularities
• Evolution of remnant Fermi surface state in lightly-doped correlated spin-orbit insulator Sr${}_{2-x}$La${}_x$IrO${}_4$
• La-doping effect on spin-orbit coupled Sr2IrO4 probed by x-ray absorption spectroscopy
• 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
• Single crystal growth of iridates without platinum impurities
• Orbitally-selective Breakdown of the Fermi Liquid and Simultaneous Enhancement of Metallic and Insulating States in Correlated Multi-band Systems with Spin-orbit Coupling
• Superconductivity at 12 K in La${}_2$IOs${}_2$: a 5d metal with osmium honeycomb layer
• Magnetic and electronic properties of La${}_{3}M$O${}_7$ and possible polaron formation in hole-doped La${}_{3}M$O${}_7$ ($M$=Ru and Os)
• A $j_{\mathrm{eff}}=1/2$ pseudospinon continuum in CaIrO${}_3$
• Three-dimensional Stacking of Canted Antiferromagnetism and Pseudospin Current in Undoped Sr${}_2$IrO${}_4$: Symmetry Analysis and Microscopic Model Realization
• Fortuitous partners of antiferromagnetic and Mott states in spin-orbit-coupled Sr2IrO4: A study of Sr2Ir1-xMxO4 (M=Fe or Co)
• Insulator-metal transition in deep Sr-vacant spin-orbit Mott insulator Sr2IrO4