Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 54: Correlated Electrons: Complex Oxides and Other Materials
TT 54.9: Talk
Thursday, April 4, 2019, 11:45–12:00, H22
New insights into doped Sr2IrO4 — •Benjamin Lenz1, Cyril Martins2, and Silke Biermann1,3 — 1CPHT, Ecole Polytechnique, Palaiseau, France — 2LCPQ, Université Paul Sabatier, Toulouse, France — 3Collège de France, Paris, France
The spin-orbit system Sr2IrO4 has been in the spotlight in recent years due to its striking similarity to isostructural high-Tc superconducting copper oxides. Here, we present new insights into the spectral properties of Sr2IrO4 using a combination of ab-initio density functional theory and quantum cluster techniques. We find good agreement with available angular-resolved photoemission spectra in the antiferromagnetic low-temperature and high-temperature paramagnetic phases of pure Sr2IrO4, as well as for electron- and hole-doped compounds. Furthermore, we discuss an intriguing k-dependence in the composition of the spin-orbit entangled jeff=1/2 states.