Speaker
Vincent Esposito
(PSI - Paul Scherrer Institut)
Description
We report a new route to manipulate the electronic properties of a material via vibrational excitation. Using the LCLS free electron laser we investigate the dynamics of the charge order in a manganite film following resonant excitation of a phonon mode to large amplitude. Combining our experimental results with ab initio calculation, we find that the direct nonlinear coupling between the excited mode and the electronic degrees of freedom is sufficiently strong to drive the insulator-metal transition in this material. The generalization of our approach leads to new ways of manipulating materials e.g. shaping their properties on ultrashort timescales.
Authors
Dr
Michael Fechner
(Max Planck Institute for the Structure and Dynamics of Matter, CFEL, Hamburg)
Dr
Michael Foerst
(MPSD)
Dr
Paul Beaud
(Swiss Light Source, Paul Scherrer Institut)
Roman Mankowsky
(MPSD)
Dr
Urs Staub
(Paul-Scherrer Institute, Switzerland)
Vincent Esposito
(PSI - Paul Scherrer Institut)
