Regensburg 2010 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 19: CE: Metal-Insulator Transition 2
TT 19.2: Talk
Wednesday, March 24, 2010, 09:45–10:00, H18
Comparison of EELS and RIXS measurements for the single layer manganite La1−xSr1+xMnO4 — •Roberto Kraus1, Jochen Geck1, Matthias Schrade1, Martin Knupfer1, Bernd Büchner1, and Pieter Glatzel2 — 1IFW Dresden, Germany — 2ESRF Grenoble, France
The manganites show a variety of magnetic and electronic phases which are connected to charge, spin and orbital degrees of freedom. One example is the single layered perovskite La1−xSr1+xMnO4. Upon hole doping new in-gap excitations appear and up to now it is unclear if they are of charge-transfer or Mott-Hubbard type. To characterize the excitations in the system, we performed electron energy-loss spectroscopy (EELS) and resonant inelastic X-ray scattering (RIXS) of the Mn K-edge. The observed in-gap excitation shows a small positive dispersion and a clear positive shift as a function of temperature in the half-doped sample.