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Title: X-ray nanodiffraction imaging reveals distinct nanoscopic dynamics of an ultrafast phase transition

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [2];  [2];  [3];  [3];  [2];  [4]; ORCiD logo [5]; ORCiD logo [6]
  1. Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, WI 53706
  2. Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439
  3. Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439
  4. Center for Magnetic Recording Research, University of California San Diego, La Jolla, CA 92903
  5. Department of Materials Science and Engineering, University of Wisconsin–Madison, Madison, WI 53706
  6. Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, Materials Science Division, Argonne National Laboratory, Lemont, IL 60439

Significance Phase transitions, the changes between states of matter with distinct electronic, magnetic, or structural properties, are at the center of condensed matter physics and underlie valuable technologies. First-order phase transitions are intrinsically heterogeneous. When driven by ultrashort excitation, nanoscale phase regions evolve rapidly, which has posed a significant experimental challenge to characterize. The newly developed laser-pumped X-ray nanodiffraction imaging technique reported here has simultaneous 100-ps temporal and 25-nm spatial resolutions. This approach reveals pathways of the nanoscale structural rearrangement upon ultrafast optical excitation, different from those transitions under slowly varying parameters. The spatiotemporally resolved structural characterization provides crucial nanoscopic insights into ultrafast phase transitions and opens opportunities for controlling nanoscale phases on ultrafast time scales.

Research Organization:
Argonne National Laboratory (ANL), Lemont, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357; SC0003678
OSTI ID:
1866635
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 19 Vol. 119; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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