典型文献
A molecular dynamics study of laser-excited gold
文献摘要：
The structural evolution of laser-excited systems of gold has previously been measured through ultrafast MeV electron diffraction.However,there has been a long-standing inability of atomistic simulations to provide a consistent picture of the melting process,leading to large discrepancies between the predicted threshold energy density for complete melting,as well as the transition between heterogeneous and homogeneous melting.We make use of two-temperature classical molecular dynamics simulations utilizing three highly successful interatomic potentials and reproduce electron diffraction data presented by Mo et al.[Science 360,1451-1455(2018)].We recreate the experimental electron diffraction data,employing both a constant and temperature-dependent electron-ion equilibration rate.In all cases,we are able to match time-resolved electron diffraction data,and find consistency between atomistic simulations and experiments,only by allowing laser energy to be transported away from the interaction region.This additional energy-loss pathway,which scales strongly with laser fluence,we attribute to hot electrons leaving the target on a timescale commensurate with melting.
文献关键词：
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作者姓名：
Jacob M.Molina;T.G.White
作者机构：
University of Nevada,Reno,Nevada 89557,USA
文献出处：
引用格式：
[1]Jacob M.Molina;T.G.White-.A molecular dynamics study of laser-excited gold)[J].极端条件下的物质与辐射（英文）,2022(03):20-30
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0.65611
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