Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping

V. Brouet; J. Mansart; L. Perfetti; C. Piovera; I. Vobornik; P. Le Fèvre; F. Bertran; S. C. Riggs; M. C. Shapiro; P. Giraldo-Gallo; I. R. Fisher

doi:10.1103/PhysRevB.92.081117

paper

Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping

arXiv:1503.08120 · doi:10.1103/PhysRevB.92.081117

Abstract

We study with Angle Resolved PhotoElectron Spectroscopy (ARPES) the evolution of the electronic structure of Sr2IrO4, when holes or electrons are introduced, through Rh or La substitutions. At low dopings, the added carriers occupy the first available states, at bottom or top of the gap, revealing an anisotropic gap of 0.7eV in good agreement with STM measurements. At further doping, we observe a reduction of the gap and a transfer of spectral weight across the gap, although the quasiparticle weight remains very small. We discuss the origin of the in-gap spectral weight as a local distribution of gap values.

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Cited by in corpus (42)

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Square Lattice Iridates
Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
Time-reversal symmetry breaking hidden order in Sr $_{2}$ (Ir,Rh)O $_{4}$
Crystal growth and intrinsic magnetic behavior of Sr $_{2}$ IrO $_{4}$
Spin-orbit-controlled metal-insulator transition in Sr $_{2}$ IrO $_{4}$
Electron and hole doping in the relativistic Mott insulator Sr $_{2}$ IrO $_{4}$ : a first-principles study using band unfolding technique
Correlation effects and hidden spin-orbit entangled electronic order in parent and electron-doped iridates Sr $_{2}$ IrO $_{4}$
Spectral functions of Sr $_{2}$ IrO $_{4}$ : theory versus experiment
Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4
Formation of an incoherent metallic state in Rh-doped Sr $_{2}$ IrO $_{4}$
Bond Directional Anapole Order in a Spin-Orbit Coupled Mott Insulator Sr $_{2}$ (Ir $_{1 - x}$ Rh $_{x}$ )O $_{4}$
Correlation induced electron-hole asymmetry in quasi-2D iridates
Evolution of remnant Fermi surface state in lightly-doped correlated spin-orbit insulator Sr $_{2 - x}$ La $_{x}$ IrO $_{4}$
ARPES study of orbital characters, symmetry breakings and pseudogaps in doped and pure Sr2IrO4
Non-local Coulomb correlations in pure and electron-doped $Sr_{2} IrO_{4}$ : spectral functions, Fermi surface and pseudogap-like spectral weight distributions from oriented cluster dynamical mean field theory
Impurity-induced phonon thermal Hall effect in the antiferromagnetic phase of Sr2IrO4
Pseudogap and electronic structure of electron-doped Sr $_{2}$ IrO $_{4}$
Spectroscopic evidence for electron-boson coupling in electron-doped Sr $_{2}$ IrO $_{4}$
Disentangling structural and electronic properties in V $_{2}$ O $_{3}$ thin films: a genuine non-symmetry breaking Mott transition
Time resolved photoemission of Sr $_{2}$ IrO $_{4}$
Light-induced insulator-metal transition in Sr $_{2}$ IrO $_{4}$ reveals the nature of the insulating ground state
Odd-Parity Superconductivity Driven by Octahedra Rotations in Iridium Oxides
Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr $_{2}$ Ir $_{1 - x}$ Rh $_{x}$ O $_{4}$
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Influence of multiplet structure on photoemission spectra of spin-orbit driven Mott insulators: application to $S r_{2} Ir O_{4}$
Determination of the local structure of Sr $_{2 - x}$ M $_{x}$ IrO $_{4}$ (M = K, La) as a function of doping and temperature
Carrier density crossover and quasiparticle mass enhancement in a doped 5 $d$ Mott insulator
Single crystal growth of iridates without platinum impurities
Band unfolding with a general transformation matrix: from code implementation to interpretation of photoemission spectra
Coherent and incoherent bands in La and Rh doped Sr3Ir2O7
Electrochemical Oxygen Intercalation into Sr $_{2}$ IrO $_{4}$
Constraints on the two-dimensional pseudo-spin 1/2 Mott insulator description of Sr $_{2}$ IrO $_{4}$
Stability of the Antiferromagnetic State in the Electron Doped Iridates
The "dark phase'' in Sr $_{2}$ Ir $_{1 - x}$ Rh $_{x}$ O $_{4}$ revealed by Seebeck and Hall measurements
Evolution of the spectral lineshape at the magnetic transition in Sr2IrO4 and Sr3Ir2O7
Quantum Criticality in a Layered Iridate
Anomalous Nodal Gap in a Doped Spin-1/2 Antiferromagnetic Mott Insulator
Three-dimensional Stacking of Canted Antiferromagnetism and Pseudospin Current in Undoped Sr $_{2}$ IrO $_{4}$ : Symmetry Analysis and Microscopic Model Realization
Fermi surface and pseudogap in highly doped Sr $_{2}$ IrO $_{4}$