title: Ultrafast structural and electronic dynamics of the metallic phase in a layered manganite.
abstract: The transition between different states in manganites can be driven by various external stimuli. Controlling these transitions with light opens the possibility to investigate the microscopic path through which they evolve. We performed femtosecond (fs) transmission electron microscopy on a bi-layered manganite to study its response to ultrafast photoexcitation. We show that a photoinduced temperature jump launches a pressure wave that provokes coherent oscillations of the lattice parameters, detected via ultrafast electron diffraction. Their impact on the electronic structure are monitored via ultrafast electron energy loss spectroscopy, revealing the dynamics of the different orbitals in response to specific structural distortions.
authors.affiliation: Laboratory for Ultrafast Microscopy and Electron Scattering , ICMP, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: L
authors.initials: L
authors.lastname: Piazza
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: C
authors.initials: C
authors.lastname: Ma
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: H X
authors.initials: HX
authors.lastname: Yang
authors.affiliation: Laboratory for Ultrafast Microscopy and Electron Scattering , ICMP, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Mann
authors.affiliation: Department of Condensed Matter Physics, Brookhaven National Laboratory , Upton, New York 11973, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics , Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: J Q
authors.initials: JQ
authors.lastname: Li
authors.affiliation: Laboratory for Ultrafast Microscopy and Electron Scattering , ICMP, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: F
authors.initials: F
authors.lastname: Carbone