Quasimomentum-Space Image for Ultrafast Melting of Silicon.
Quasimomentum-Space Image for Ultrafast Melting of Silicon.
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硅超快熔化的拟动量空间图像
DOI:
10.1103/physrevlett.116.153901
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发表时间:
2016
影响因子:
8.6
通讯作者:
M. E. Garcia
中科院分区:
文献类型:
--
作者:
T. Zier;E. S. Zijlstra;M. E. Garcia
By exciting electron-hole pairs that survive for picoseconds strong femtosecond lasers may transiently influence the bonding properties of semiconductors, causing structure changes, in particular, ultrafast melting. In order to determine the energy flow during this process in silicon we performedab initiomolecular dynamics simulations and an analysis in quasimomentum space. We found that energy flows very differently as a function of increasing excitation density, namely, mainly through long wavelength,-point, or-point lattice vibrations, respectively.
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