title: Measurement of transient atomic displacements in thin films with picosecond and femtometer resolution.
abstract: We report measurements of the transient structural response of weakly photo-excited thin films of BiFeO3, Pb(Zr,Ti)O3, and Bi and time-scales for interfacial thermal transport. Utilizing picosecond x-ray diffraction at a 1.28 MHz repetition rate with time resolution extending down to 15 ps, transient changes in the diffraction angle are recorded. These changes are associated with photo-induced lattice strains within nanolayer thin films, resolved at the part-per-million level, corresponding to a shift in the scattering angle three orders of magnitude smaller than the rocking curve width and changes in the interlayer lattice spacing of fractions of a femtometer. The combination of high brightness, repetition rate, and stability of the synchrotron, in conjunction with high time resolution, represents a novel means to probe atomic-scale, near-equilibrium dynamics.
authors.forename: M
authors.initials: M
authors.lastname: Kozina
authors.forename: T
authors.initials: T
authors.lastname: Hu
authors.affiliation: Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Wittenberg
authors.forename: E
authors.initials: E
authors.lastname: Szilagyi
authors.forename: M
authors.initials: M
authors.lastname: Trigo
authors.forename: T A
authors.initials: TA
authors.lastname: Miller
authors.affiliation: Department of Physics, University of Michigan , Ann Arbor, Michigan 48109, USA.
authors.forename: C
authors.initials: C
authors.lastname: Uher
authors.affiliation: Department of Materials Science and Engineering, University of Illinois Urbana Champaign , Urbana, Illinois 61801, USA.
authors.forename: A
authors.initials: A
authors.lastname: Damodaran
authors.affiliation: Department of Materials Science and Engineering, University of Illinois Urbana Champaign , Urbana, Illinois 61801, USA.
authors.forename: L
authors.initials: L
authors.lastname: Martin
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA.
authors.forename: A
authors.initials: A
authors.lastname: Mehta
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA.
authors.forename: J
authors.initials: J
authors.lastname: Corbett
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, USA.
authors.forename: J
authors.initials: J
authors.lastname: Safranek
authors.forename: D A
authors.initials: DA
authors.lastname: Reis
authors.forename: A M
authors.initials: AM
authors.lastname: Lindenberg