Seminar ÚFKL: Ekaterina M. Pärschke

Department of Condensed Matter Physics (ÚFKL) invites you to the lecture

Ekaterina M. Pärschke (IST Austria):
Magnetic interactions, charge excitations, and strong correlations in iridates under strain and pressure

Abstract:

Iridates are a family of Mott insulators displaying peculiar competition of fundamental interactions: electron-electron correlations, spin-orbit coupling (SOC), and spin-lattice coupling. Moreover, understanding the physics of iridates is expected to shed light on mechanisms of high-temperature superconductivity.

After introducing this interesting family of strongly correlated materials, I will present our recent theoretical advances in understanding charge and magnetic excitations in iridates, comparing theory to recent Photoemission Spectroscopy (ARPES), Resonant Inelastic X-ray scattering (RIXS), and two-magnon Raman scattering data. I will also discuss how the structural and physical properties of iridates can be manipulated by applying external pressure and strain. In iridates, SOC mediates unusual almost rigid locking of the magnetic momenta to the lattice through the orbital momenta, providing a new route to control structural and physical properties. Competition between orbital and spin angular momenta of light at the antiferromagnetic resonances and Landau level transitions.