Speaker
Yann Alexanian
(Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland)
Description
Sr$_2$IrO$_4$ is a layered perovskite isostructural to the cuprate La$_2$CuO$_4$. The combination of strong spin-orbit coupling inherent to Ir$^{4+}$ ions and modest Coulomb interaction induces a Mott insulating ground state. Theses similarities with cuprates extend to the unusual metallic state of lightly doped Sr$_2$IrO$_4$ 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, the antinodal pseudogap persists up to highest doping and up to high temperature, in contrast to previous results on surface doped Sr$_2$IrO$_4$.
Primary author
Yann Alexanian
(Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland)
Co-authors
Prof.
Robin Perry
(ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxon OX11 0QX, United Kingdom ; London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom)
Dr
Anna Tamai
(Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland)
Prof.
Felix Baumberger
(Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland ; Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)
