Strain-induced superconductivity in Sr2IrO4

Abstract

Multi-orbital quantum materials with strong interactions can host a variety of novel phases. In this work we study the possibility of interaction-driven superconductivity in the iridate compound Sr${}_2$IrO${}_4$ under strain and doping. We find numerous regimes of strain-induced superconductivity in which the pairing structure depends on model parameters. Spin-fluctuation mediated superconductivity is modeled by a Hubbard-Kanamori model with an effective particle-particle interaction, calculated via the random phase approximation. Magnetic orders are found using the Stoner criterion. The most likely superconducting order we find has $d$-wave pairing, predominantly in the total angular momentum, $J=1/2$ states. Moreover, an $s_{\pm }$-order which mixes different bands is found at high Hund's coupling, and at high strain anisotropic $s$- and $d$-wave orders emerge. Finally, we show that in a fine-tuned region of parameters a spin-triplet $p$-wave order exists. The combination of strong spin-orbit coupling, interactions, and a sensitivity of the band structure to strain proves a fruitful avenue for engineering new quantum phases.

26 pages, 21 figures

References in corpus (32)

• 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 electronic correlations from Hund's coupling
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
• Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
• Hidden quasi one-dimensional superconductivity in Sr${}_2$RuO${}_4$
• d-wave pairing from spin fluctuations in the KxFe{2-y}Se2 superconductors
• Sign-problem-free quantum Monte Carlo of the onset of antiferromagnetism in metals
• Topological properties of spin-triplet superconductors and the Fermi surface topology in the normal state
• 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
• Effects of strain on the electronic structure, superconductivity, and nematicity in FeSe studied by angle-resolved photoemission spectroscopy
• Properties of edge states in spin-triplet two-band superconductor
• Strain-engineering of the charge and spin-orbital interactions in Sr2IrO4
• Unidirectional spin density wave state in metallic (Sr1-xLax)2IrO4
• Superconductivity in spin-$3/2$ systems: symmetry classification, odd-frequency pairs, and Bogoliubov Fermi surfaces
• First-Principles Calculation of Spin and Orbital Contributions to Magnetically Ordered Moments in Sr${}_2$IrO${}_4$
• Reversible shift in the superconducting transition for La1.85Sr0.15CuO4 and BaFe1.8Co0.2As2 using piezoelectric substrates
• Eliashberg theory for spin-fluctuations mediated superconductivity -- Application to bulk and monolayer FeSe
• Possible quantum paramagnetism in compressed Sr${}_2$IrO${}_4$
• Superconductivity in Correlated Multi-Orbital Systems with Spin-Orbit Coupling: Coexistence of Even- and Odd-Frequency Pairing and the Case of Strontium Ruthenate
• Inter-orbital singlet pairing in Sr${}_2$RuO${}_4$: a Hund's superconductor
• Metastable $\pi$-junction between an s${}_{\pm }$-wave and an s-wave superconductor
• Unconventional Superconductivity arising from Multipolar Kondo Interactions
• Origin of the different electronic structure of Rh- and Ru-doped Sr2IrO4
• Magnetic order, disorder, and excitations under pressure in the Mott insulator Sr${}_2$IrO${}_4$
• Modeling multiorbital effects in Sr2IrO4 under strain and a Zeeman field
• Evolution of electronic structure of Ru-doped single-crystal iridiates, Sr${}_2$Ir${}_{1-x}$Ru${}_x$O${}_4$
• Evolution of electronic and magnetic properties of Sr${}_2$IrO${}_4$ under strain

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