Send to

Choose Destination
Phys Rev Lett. 2009 Oct 9;103(15):155702. Epub 2009 Oct 9.

Ultrafast structural phase transition driven by photoinduced melting of charge and orbital order.

Author information

Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.


We use femtosecond x-ray diffraction to probe directly the structural dynamics of a charge ordered and orbitally ordered thin film of La0.42Ca0.58MnO3 initiated by an ultrafast optical pulse. At low excitation fluences we observe the displacive excitation of a coherent optical A(g) phonon. Under high excitation conditions we observe a complete phase transition within 1 ps via the disappearance of a superlattice reflection. The initial step of the phase transition occurs on a time scale significantly faster than the 200 fs time resolution of our experiment.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center