Marco Grioni
February 25(Thu) - February 25(Thu), 2016
Title: The electronic structure of transition metal oxides probed by high-
(and higher) energy spectroscopies
Speaker: Marco Grioni (Institute of Physics –EPFL)
Transition metal oxide systems –bulk, surfaces and interfaces –exhibit a dazzling variety of electronic and
magnetic properties. This richness and complexity derives in a crucial way from the peculiar nature of the
hybrid TM d –O p states, which are shaped by competing electron-electron, electron-phonon and
magnetic interactions. Angle-resolved photoemission (ARPES) and resonant inelastic x-ray scattering (RIXS) provide complementary views of the electronic structure of these materials, of their excitations, and of the nature of the leading interactions. In this talk I will present recent ARPES and RIXS results showing the formation and disapperance of polarons in TiO2-anatase, and discuss the hopping of Zhang-Rice singlets between weakly-coupled sublattices in tetragonal CuO, a newly synthesized cuprate material.