Brian Moritz (SIMES Friday Seminar)

Date(s) - Oct 18 2013
11:00 AM - 12:30 PM

Shasta Room, Bldg. 40, Room 361


Low energy excitations revealed by resonant inelastic x-ray scattering

Brian Moritz

Associate Staff Scientist

SLAC National Accelerator Laboratory

Resonant inelastic x-ray scattering (RIXS) has emerged as a powerful tool for studying electronic multi-particle charge correlations which can provide critical information about charge dynamics and charge transfer or orbital excitations.  Advances in instrumentation have pushed the resolution of this technique to a point where, for the first time, it is possible to image low energy excitations that carry information about charge collective behavior as well as the lattice and spin degrees of freedom.  I will describe our efforts to understand the RIXS profile of correlated electron systems with specific emphasis on the cuprate materials, highlighted by recent experiments.  I will discuss observations of electron-phonon coupling in a one-dimensional insulating copper oxide and of persistent spin excitations in the two-dimensional cuprate high-temperature superconductors.  These examples serve to highlight the capabilities of RIXS and the various computational techniques which we employ to understand these low energy excitations and how they manifest in the RIXS cross-section.