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 K 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. © 2006 The American Physical Society.
Polarized resonant inelastic X-ray scattering as an ultrafine probe of excited states of La2CuO4 / Shukla, A.; Calandra, M.; Taguchi, M.; Kotani, A.; Vanko, G.; Cheong, S. -W.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 96:7(2006). [10.1103/PhysRevLett.96.077006]
Polarized resonant inelastic X-ray scattering as an ultrafine probe of excited states of La2CuO4
Calandra M.;
2006-01-01
Abstract
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 K 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. © 2006 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione