Seminars Archive

Soft X-ray Resonant Inelastic X-ray Scattering (RIXS): doing optics with q-dependence and chemical selectivity

Abstract
Novel synchrotron radiation spectroscopies probe the electronic structure of strongly correlated materials with unprecedented sensitivity and accuracy. Resonant Inelastic X-ray Scattering (RIXS) in particular offers a view on local and collective excitations, complementary to established techniques like neutrons, optics, or ARPES. An important step for RIXS was the recent commissioning at the Swiss Light Source of the high-resolution (E/∆E~10\'000) SAXES soft x-ray RIXS spectrometer. The observation of low-energy spectral features by this instrument open the way to new physics. I will present recent data on the model strongly correlated compound NiO and on selected cuprates, showing the first RIXS fingerprints of local and collective magnetic excitations.