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Femtosecond phase-transition in hard x-ray excited bismuth

Journal Article · · Scientific Reports
 [1];  [1];  [2];  [3];  [1];  [4];  [1];  [5];  [6];  [1];  [7];  [1];  [1];  [8];  [9];  [9];  [1];  [1];  [1];  [1] more »;  [10];  [1] « less
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland); Synchrotron SOLEIL, Saint-Aubin (France)
  3. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science (CFEL); Uppsala Univ. (Sweden). Dept. of Physics and Astronomy
  4. Uppsala Univ. (Sweden). Dept. of Physics and Astronomy; KTH Royal Inst. of Technology, Stockholm (Sweden). Dept. of Applied Physics
  5. Czech Academy of Sciences, Prague (Czech Republic). Inst. of Physics. Inst. of Plasma Physics
  6. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science (CFEL)
  7. Paul Scherrer Inst. (PSI), Villigen (Switzerland); Univ. of Basel (Switzerland). Center for Cellular Imaging and NanoAnalytics (C-CINA). Biozentrum
  8. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science (CFEL); Inst. for Plasma Research, Gandhinagar (India)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source
  10. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science (CFEL); Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Nuclear Physics
+ Show Author Affiliations
The evolution of bismuth crystal structure upon excitation of its A1g phonon has been intensely studied with short pulse optical lasers. Here we present the first-time observation of a hard x-ray induced ultrafast phase transition in a bismuth single crystal at high intensities (~1014 W/cm2). The lattice evolution was followed using a recently demonstrated x-ray single-shot probing setup. The time evolution of the (111) Bragg peak intensity showed strong dependence on the excitation fluence. After exposure to a sufficiently intense x-ray pulse, the peak intensity dropped to zero within 300 fs, i.e. faster than one oscillation period of the A1g mode at room temperature. Our analysis indicates a nonthermal origin of a lattice disordering process, and excludes interpretations based on electron-ion equilibration process, or on thermodynamic heating process leading to plasma formation.
Research Organization:
Czech Academy of Sciences, Prague (Czech Republic); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Paul Scherrer Inst. (PSI), Villigen (Switzerland); SLAC National Accelerator Lab., Menlo Park, CA (United States); Uppsala Univ. (Sweden)
Sponsoring Organization:
Czech Ministry of Education; European Union (EU); Helmholtz Association (Germany); Swedish Research Council; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1503536
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 9; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (3)

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
condensed-matter physics
phase transitions and critical phenomena