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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
Start: 10.00
Location: Bernoulliborg 5161.0267
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.

  [1] K. Miyano et al. Phys. Rev. Lett. 78 4257 (1997)

[2] M. Matsubara et al. Phys. Rev. Lett. 99 207401 (2007)

[3] T. Ogasawara et al., Phys. Rev. B 63, 113105 (2001).

Last modified:22 October 2012 2.30 p.m.