Time resolved photoemission of Sr${}_2$IrO${}_4$

Abstract

We investigate the temporal evolution of electronic states in strontium iridate Sr${}_2$IrO${}_4$. The time resolved photoemission spectra of intrinsic, electron doped and the hole doped samples are monitored in identical experimental conditions. Our data on intrinsic and electron doped samples, show that primary doublon-holon pairs relax near to the chemical potential on a timescale shorter than $70$ fs. The subsequent cooling of low energy excitations takes place in two step: a rapid dynamics of $\cong 120$ fs is followed by a slower decay of $\cong 1$ ps. The reported timescales endorse the analogies between Sr${}_2$IrO${}_4$ and copper oxides.

arXiv comment5 pages, 4 figures

References in corpus (16)

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• Charge Recombination in Undoped Cuprates
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Cited by in corpus (9)

• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• Spectral functions of Sr${}_2$IrO${}_4$: theory versus experiment
• A Hubbard exciton fluid in a photo-doped antiferromagnetic Mott insulator
• Non-local Coulomb correlations in pure and electron-doped ${\mathrm{Sr}}_2{\mathrm{IrO}}_4$: spectral functions, Fermi surface and pseudogap-like spectral weight distributions from oriented cluster dynamical mean field theory
• Decoupling of static and dynamic criticality in a driven Mott insulator
• Single crystal growth of iridates without platinum impurities
• Evidence of Slater-type mechanism as origin of insulating state in Sr2IrO4
• The rich phase diagram of the prototypical iridate Ba${}_2$IrO${}_4$: Effective low-energy models and metal-insulator transition
• Dynamical correlations and nonequilibrium sum rules in photodoped Hubbard ladders