Polarized resonant inelastic x-ray scattering as an ultrafine probe of excited States of La2CuO4.
X-ray absorption is the standard method to probe the unoccupied density of states at a given edge. Here we show that polarized resonant inelastic x-ray scattering in La2CuO4 at the Cu L edge is extremely sensitive to the environment of the Cu atom and the fine structure in the Cu 4p density of states. Combined ab initio and many-body cluster calculations, used for the first time in such a context, show remarkable agreement with experiment. In particular, we identify a nonlocal effect, namely, a transition to off-site Cu 3d states.
Shukla
Abhay
A
Institut de Minéralogie et de Physique des Milieux Condensées, 4 Place Jussieu, 75252 Paris cedex 05, France.
Calandra
Matteo
M
Taguchi
Munetaka
M
Kotani
Akio
A
Vankó
György
G
Cheong
S-W
SW