U61.00002. Multiorbital effects in Sr2IrO4 under an external field

Presented by: Lena Engström


Many parallels have been drawn between the spin-orbit coupled Mott insulator Sr2IrO4 and the high-Tc superconducting cuprates. In the undoped compound, a one band Jeff=1/2 model has been shown to capture the observed magnetic order. In other regimes, the applicability of this model is less clear, and the correlated phases are less understood due to potentially complex multiorbital physics. We use a multiple order parameter, self-consistent mean-field approach to explore the relevance of multiorbital effects to possible exotic phases in Sr2IrO4 in an external magnetic field. We study the contributions from both spin and orbital degrees of freedom to the magnetic moment. We thus unravel what role spin orbit coupling plays for emerging orders. Implications for superconductivity and thermal Hall measurements are discussed. - “Etablissement de nouveaux chercheurs universitaires” Grant from FRQNT - Discovery Grant from NSERC - Grant from Fondation Courtois


  • Lena Engström
  • Tami Pereg-Barnea
  • William Witczak-Krempa


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