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Title: Heterogeneous to homogeneous melting transition visualized with ultrafast electron diffraction

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [3];  [1]; ORCiD logo [1];  [4]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [6]; ORCiD logo [3];  [1];  [1]; ORCiD logo [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Rostock (Germany). Inst. of Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy
  5. Univ. of Rostock (Germany). Inst. of Physics
  6. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Electrical and Computer Engineering
  7. Univ. of Duisburg-Essen, Duisburg (Germany). Faculty of Physics. Centre for Nanointegration Duisburg-Essen

The ultrafast laser excitation of matters leads to nonequilibrium states with complex solid-liquid phase-transition dynamics. In this paper, we used electron diffraction at mega–electron volt energies to visualize the ultrafast melting of gold on the atomic scale length. For energy densities approaching the irreversible melting regime, we first observed heterogeneous melting on time scales of 100 to 1000 picoseconds, transitioning to homogeneous melting that occurs catastrophically within 10 to 20 picoseconds at higher energy densities. We showed evidence for the heterogeneous coexistence of solid and liquid. We determined the ion and electron temperature evolution and found superheated conditions. Finally, our results constrain the electron-ion coupling rate, determine the Debye temperature, and reveal the melting sensitivity to nucleation seeds.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Sciences and Engineering Research Council of Canada (NSERC); German Research Foundation (DFG)
Grant/Contract Number:
AC52-06NA25396; AC02-76SF00515
OSTI ID:
1459842
Report Number(s):
LA-UR-18-23801
Journal Information:
Science, Vol. 360, Issue 6396; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 99 works
Citation information provided by
Web of Science

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Cited By (12)

Melting of CaSiO 3 Perovskite at High Pressure journal February 2019
Direct observation of picosecond melting and disintegration of metallic nanoparticles journal June 2019
Determination of the electron-lattice coupling strength of copper with ultrafast MeV electron diffraction journal October 2018
Real-time observation of jumping and spinning nanodroplets journal January 2020
Review on experimental and theoretical investigations of the early stage, femtoseconds to microseconds processes during laser ablation in liquid-phase for the synthesis of colloidal nanoparticles journal October 2019
Electronic heat transport versus atomic heating in irradiated short metallic nanowires journal October 2019
Visualization of ultrafast melting initiated from radiation-driven defects in solids journal May 2019
Ultrafast x-ray diffraction study of melt-front dynamics in polycrystalline thin films journal January 2020
Quantum Dynamics at Scale: Ultrafast Control of Emergent Functional Materials
  • Tiwari, Subodh C.; Krishnamoorthy, Aravind; Rajak, Pankaj
  • HPCAsia2020: International Conference on High Performance Computing in Asia-Pacific Region, Proceedings of the International Conference on High Performance Computing in Asia-Pacific Region https://doi.org/10.1145/3368474.3368489
conference January 2020
Computational Study on Homogeneous Melting of Benzene Phase I journal February 2019
Stepwise Homogeneous Melting of Benzene Phase I at High Pressure journal May 2019
Liquid-phase mega-electron-volt ultrafast electron diffraction journal March 2020

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