Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.39: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Energy shifts in pump-probe resonant soft x-ray diffraction experiments — •Christian Schüßler-Langeheine1, Christoph Trabant1,2, and Niko Pontius1 — 1Helmholtz-Zentrum Berlin — 2II. Physikalisches Institut, Universität zu Köln
Time resolved pump-probe resonant soft x-ray diffraction is a novel method to study elementary coupling mechanisms in correlated solids or ultrafast magnetism in antiferromagnets. Besides information about the amount of order and its periodicity also spectroscopic information is accessible via the energy dependence of diffraction features in the vicinity of absorption edges. From that the electronic character of a photo-excited state can be determined. For a quantitative analysis of the energy-dependent diffraction data the effect of absorption has to be taken into account. It leads to particularly strong effects, when the pump effect causes a gradient of the density of scatterers in the probed volume. We discuss, how this effect affects the spectral shape in resonant soft x-ray diffraction data.
Supported by the BMBF through contract 05K10PK2