Mazevet S, Clérouin J, Recoules V, Anglade P M, Zerah G
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2005 Aug 19;95(8):085002. doi: 10.1103/PhysRevLett.95.085002. Epub 2005 Aug 17.
Using a combination of classical and ab-initio molecular dynamics simulations, we calculate the structure and the electrical conductivity of warm dense gold during the first picoseconds after a short-pulse laser illumination. We find that the ions remain in their initial fcc structure for several picoseconds, despite electron temperatures ranging from a few to several eV after the laser illumination. The electrical conductivities calculated under these nonequilibrium conditions and using the latter assumption are in remarkable agreement with recent measurements using a short-pulse laser interacting with gold thin films.
通过结合经典分子动力学模拟和从头算分子动力学模拟，我们计算了短脉冲激光照射后最初皮秒内温稠密金的结构和电导率。我们发现，尽管激光照射后电子温度在几电子伏特到几电子伏特之间，但离子在其初始面心立方结构中保持了几皮秒。在这些非平衡条件下并使用后一种假设计算得到的电导率，与最近使用短脉冲激光与金薄膜相互作用的测量结果显著一致。
