Many-Body Effects in the Mesoscopic x-Ray Edge Problem

Many-body effects in the mesoscopic x-ray edge problem

Many-body phenomena, a key interest in the investigation of bulk solid state systems, are studied here in the context of the x-ray edge problem for mesoscopic systems. We investigate the many-body effects associated with the sudden perturbation following the x-ray excitation of a core electron into the conduction band. For small systems with dimensions at the nanoscale we find considerable devi...

Fermi-edge singularities in the mesoscopic x-ray edge problem.

We study the x-ray edge problem for a chaotic quantum dot or nanoparticle displaying mesoscopic fluctuations. In the bulk, x-ray physics is known to produce Fermi-edge singularities-deviations from the naively expected photoabsorption cross section in the form of a peaked or rounded edge. For a coherent system with chaotic dynamics, we find substantial changes; in particular, a photoabsorption ...

K-edge X-ray absorption spectra in transition metal oxides beyond the single particle approximation: shake-up many body effects

∗To whom correspondence should be addressed †Institut de Minéralogie et de Physique des Milieux condensés, Université Paris 6, CNRS, 4 Place Jussieu, 75005 Paris, France. ‡Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France ¶Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m.b.H., Albert-Einstein-Strasse 15, D12489 Berlin, German...

the plain x-ray the diagnosis of the acute abdomen_

چکیده ندارد.

Mesoscopic Transport as Many-body Physics *