Novel Jeff=1/2 Mott state induced by relativistic spin-orbit coupling in Sr2IrO4.
By B. J. Kim, Hosub Jin, S. Moon, J. Kim, Byeong-Gyu Park, C. S. Leem, Jaejun Yu, T. Noh, C. Kim, S. Oh and 4 more. Physical Review Letters, 2008
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We investigated the electronic structure of 5d transition-metal oxide Sr2IrO4 using angle-resolved photoemission, optical conductivity, x-ray absorption measurements, and first-principles band calculations. The system was found to be well described by novel effective total angular momentum Jeff states, in which the relativistic spin-orbit coupling is fully taken into account under a large crystal field. Despite delocalized Ir 5d states, the Jeff states form such narrow bands that even a small correlation energy leads to the Jeff=1/2 Mott ground state with unique electronic and magnetic behaviors, suggesting a new class of Jeff quantum spin driven correlated-electron phenomena.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/c2c877559e4172e71ae65eebad1f7d6fc73ce50f
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Citations in the corpus
- Colloquium : Topological band theory (2016, background): “2009; Young, Lee, and Kallin 2008) Ir-perovskites Srn+1IrnO3n+1 undergo a transition from a Mott insulator (Kim et al. 2008) to a correlated metal with increasing n, while orthorhombic perovskite SrIrO3 is metallic.”
- Kitaev materials (2017, background): “The formation of such a j = 1/2 Mott insulator was first observed experimentally in 2008/2009 [10, 11] for the perovskite iridate Sr2IrO4 – a 5d transition-metal oxide which is an isostructural analogue of La2CuO4, the parent compound of the cuprate superconductors.”
- Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides (2017, background): “Note that the moments all have the same magnitude, but their projections on to the plane of the page vary as their orientations rotate about the [140] direction by 2π/15 between neighboring planes [135].”
- Electrodynamics of correlated electron materials (2011, background): “In the one-dimensional compound Sr2CuO3 (Kim et al., 2008c) sharp peaks observed at 10 K were attributed to weakly bound excitons.”