Speaker
Yann Alexanian
(University of Geneva, Department of Quantum Matter Physics)
Description
Sr2IrO4 is a layered perovskite isostructural to the cuprate superconductor La2CuO4. The combination of strong spin-orbit coupling inherent to Ir4+ ions and modest Coulomb interaction induces a Mott insulating ground state with Heisenberg spin dynamics. Theses striking similarities with cuprates extend to the unusual metallic state of lightly doped Sr2IrO4 characterized by Fermi arcs and a pseudogap. Here, I will present new ARPES data on bulk crystals with higher doping than reached previously. Our results show that nodal states become more coherent with increased doping. At the same time, an antinodal pseudogap persists up to the highest doping, in contrast to previous results on surface doped Sr2IrO4.
Author
Yann Alexanian
(University of Geneva, Department of Quantum Matter Physics)
Co-authors
Anna Tamai
(Université de Genève)
Felix Baumberger
(University of Geneva)
Dr
Robin Perry
(London Centre for Nanotechnology Faculty of Maths & Physical Sciences)