Spectral functions of SrIrO: theory versus experiment
arXiv:1903.09219 · doi:10.1088/1361-648X/ab146a
Abstract
The spin-orbit Mott insulator SrIrO has attracted a lot of interest in recent years from theory and experiment due to its close connection to isostructural high-temperature copper oxide superconductors. Despite of not being superconducting its spectral features closely resemble those of the cuprates, including Fermi surface and pseudogap properties. In this article, we review and extend recent work in the theoretical description of the spectral function of pure and electron-doped SrIrO based on a cluster extension of dynamical mean-field theory ("oriented-cluster DMFT") and compare it to available angle-resolved photoemission data. Current theories provide surprisingly good agreement for pure and electron-doped SrIrO, both in the paramagnetic and antiferromagnetic phases. Most notably, one obtains simple explanations for the experimentally observed steep feature around the point and the pseudo-gap-like spectral feature in electron-doped SrIrO.
29 pages, 17 figures
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