Science@FELs 2014

Session

Condensed Matter 1

15 Sept 2014, 14:00

WHGA/001 (Paul Scherrer Institute)

3. Imaging ultrafast demagnetization dynamics after a spatially localized optical excitation

Dr Clemens von Korff Schmising (Technische Universität Berlin)

15/09/2014, 14:35

Condensed Matter

Contributed Talk

Ultrashort, coherent x-ray pulses of a free-electron laser are used to holographically image the femtosecond magnetization dynamics within a magnetic domain pattern after creation of a localized optical excitation. The time resolved experiment was carried out at the DIPROI beamline at the free electron Laser facility FERMI in Trieste, Italy. Circularly polarized, coherent, 100 fs long, soft...

7. Direct structural characterization of photo-induced coherent phonon oscillations in BaFe2As2 via ultrafast x-ray diffraction

Dr Simon Gerber (Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory)

15/09/2014, 15:00

Condensed Matter

Contributed Talk

Insight into the relationship between the intertwined lattice, spin and orbital degrees of freedom is vital for the understanding of high-temperature superconductivity in iron-based materials. We address this question by using ultrafast x-ray diffraction at the Linac Coherent Light Source (LCLS) to measure the time-evolution of a lattice Bragg peak in photo-excited BaFe2As2. Upon excitation...