Lecture Simon Wall
|26 April 2010||Bernoulliborg 5161.0267, Nijenborgh 9, 9747 AG, Groningen|
|Speaker:||Dr. Simon Wall|
|Affiliation:||Fritz Haber Institute of the Max Planck Society, Department of Physical Chemistry, Berlin|
|Title:||Ultrafast dynamics in perovskite manganites|
|Date:||Mon Apr 26, 2010|
|Host:||Paul van Loosdrecht|
|Telephone:||+31 50 363 8149|
In this talk, I will discuss the use of ultra-short visible and X-ray pulses to probe the dynamics of photoexcited manganites. After an introduction to the manganites, I will discuss how the coupling between spin, lattice and orbital degrees of freedom can be observed with sub-10 fs ultrafast transient reflectivity measurements in the parent compound LaMnO3. I will then discuss the photo-induced insulator-to-metal transition in Pr0.7Ca0.3MnO3, with both ultrafast reflection spectroscopy and picosecond X-ray absorption spectroscopy. Finally I will conclude with some preliminary results on time-resolved melting of orbital ordering with soft X-ray diffraction.
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 T. Ogasawara et al., Phys. Rev. B 63, 113105 (2001).
|Last modified:||22 October 2012 2.30 p.m.|