Correlation induced electron-hole asymmetry in quasi-2D iridates

Abstract

We determine the motion of a charge (hole or electron) added to the Mott insulating, antiferromagnetic (AF) ground-state of quasi-2D iridates such as Ba 2 IrO 4 or Sr 2 IrO 4 . We show that correlation effects, calculated within the self-consistent Born approximation, render the hole and electron case very different. An added electron forms a spin-polaron, which closely resembles the well-known cuprates, but the situation of a removed electron is far more complex. Many-body 5d 4 configurations form which can be singlet and triplets of total angular momentum J and strongly affect the hole motion between AF sublattices. This not only has important ramifications for the interpretation of (inverse-)photoemission experiments of quasi-2D iridates but also demonstrates that the correlation physics in electron- and hole-doped iridates is fundamentally different.

11 pages main text, 11 pages supplementary, 10 figures

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Cited by in corpus (16)

• Square Lattice Iridates
• Strain-engineering of the charge and spin-orbital interactions in Sr2IrO4
• Spectral functions of Sr${}_2$IrO${}_4$: theory versus experiment
• Theoretical evidence of spin-orbital-entangled $J_{\mathbf{eff}}$=1/2 state in the 3$d$ transition metal oxide CuAl${}_2$O${}_4$
• Magnetic excitations in hole-doped Sr2IrO4: A comparison with electron-doped cuprates
• Percolative Mott insulator-metal transition in doped Sr${}_2$IrO${}_4$
• Influence of multiplet structure on photoemission spectra of spin-orbit driven Mott insulators: application to $\mathbf{S}{\mathbf{r}}_2\mathbf{Ir}{\mathbf{O}}_4$
• Dynamics of a single hole in the Heisenberg-Kitaev model: a self-consistent Born approximation study
• Spin-polaron ladder spectrum of the spin-orbit-induced Mott insulator Sr${}_2$IrO${}_4$ probed by scanning tunneling spectroscopy
• Spectrum of the hole excitation in spin-orbit Mott insulator Na${}_2$IrO${}_3$
• Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling
• Evolution of electronic and magnetic properties of Sr${}_2$IrO${}_4$ under strain
• Carrier dynamics in doped bilayer iridates near magnetic quantum criticality
• Fermi surface and pseudogap in highly doped Sr${}_2$IrO${}_4$
• Magnetic polarons due to spin-length fluctuations in ${\mathbf{d}}^4$ spin-orbit Mott systems
• Electrical Modulation and Probing of Antiferromagnetism in Hybrid Multiferroic Heterostructures