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Title: Measurement of transient atomic displacements in thin films with picosecond and femtometer resolution

Journal Article · · Structural Dynamics
DOI:https://doi.org/10.1063/1.4875347· OSTI ID:1370096
 [1];  [1];  [2];  [1];  [3];  [1];  [4];  [5];  [5];  [2];  [2];  [2];  [1];  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE); Stanford Univ., CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Ultrafast Laser Science and Engineering Inst. (PULSE)
  4. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  5. Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Materials Science and Engineering

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.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Solar and Thermal Energy Conversion (CSTEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0000957
OSTI ID:
1370096
Journal Information:
Structural Dynamics, Vol. 1, Issue 3; Related Information: CSTEC partners with University of Michigan (lead); Kent State University; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Emerging photon technologies for chemical dynamics journal January 2014
Cavity-Induced Modifications of Molecular Structure in the Strong-Coupling Regime journal November 2015
Optimized spatial overlap in optical pump–X-ray probe experiments with high repetition rate using laser-induced surface distortions journal February 2016
Atomic-scale imaging of ultrafast materials dynamics journal July 2018
Feasibility of Valence-to-Core X-ray Emission Spectroscopy for Tracking Transient Species journal February 2015
Cavity-induced modifications of molecular structure in the strong coupling regime text January 2015