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Title: Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime

Abstract

We present a new measurement of lattice disassembly times in femtosecond-laser-heated polycrystalline Au nanofoils. The results are compared with molecular dynamics simulations incorporating a highly optimized, embedded-atom-method interatomic potential. For absorbed energy densities of 0.9 – 4.3 MJ / kg , the agreement between the experiment and simulation reveals a single-crystal-like behavior of homogeneous melting and corroborates the applicability of the interatomic potential in the nonequilibrium warm dense matter regime. For energy densities below 0.9 MJ / kg , the measurement is consistent with nanocrystal behavior where melting is initiated at the grain boundaries.

Authors:
 [1];  [1];  [2];  [2];  [1];  [3];  [1];  [4]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
  3. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Electrical and Computer Engineering
  4. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1468731
Alternate Identifier(s):
OSTI ID: 1464668
Grant/Contract Number:  
AC02-76SF00515; FWP 100182
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 7; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Chen, Z., Mo, M., Soulard, L., Recoules, V., Hering, P., Tsui, Y. Y., Glenzer, S. H., and Ng, A. Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime. United States: N. p., 2018. Web. doi:10.1103/physrevlett.121.075002.
Chen, Z., Mo, M., Soulard, L., Recoules, V., Hering, P., Tsui, Y. Y., Glenzer, S. H., & Ng, A. Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime. United States. doi:10.1103/physrevlett.121.075002.
Chen, Z., Mo, M., Soulard, L., Recoules, V., Hering, P., Tsui, Y. Y., Glenzer, S. H., and Ng, A. Wed . "Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime". United States. doi:10.1103/physrevlett.121.075002. https://www.osti.gov/servlets/purl/1468731.
@article{osti_1468731,
title = {Interatomic Potential in the Nonequilibrium Warm Dense Matter Regime},
author = {Chen, Z. and Mo, M. and Soulard, L. and Recoules, V. and Hering, P. and Tsui, Y. Y. and Glenzer, S. H. and Ng, A.},
abstractNote = {We present a new measurement of lattice disassembly times in femtosecond-laser-heated polycrystalline Au nanofoils. The results are compared with molecular dynamics simulations incorporating a highly optimized, embedded-atom-method interatomic potential. For absorbed energy densities of 0.9 – 4.3 MJ / kg , the agreement between the experiment and simulation reveals a single-crystal-like behavior of homogeneous melting and corroborates the applicability of the interatomic potential in the nonequilibrium warm dense matter regime. For energy densities below 0.9 MJ / kg , the measurement is consistent with nanocrystal behavior where melting is initiated at the grain boundaries.},
doi = {10.1103/physrevlett.121.075002},
journal = {Physical Review Letters},
number = 7,
volume = 121,
place = {United States},
year = {2018},
month = {8}
}

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