Electron-phonon equilibration in laser-heated gold films
Electron-phonon equilibration in laser-heated gold films
复制标题
DOI：
10.1103/physrevb.90.014305
复制
发表时间：
2014-07-23
影响因子：
3.7
通讯作者：
Gregori, G.
中科院分区：
文献类型：
--
作者：
White, T. G.;Mabey, P.;Gregori, G.
通过用强短脉冲激光照射薄金属箔，我们创建了一个远离平衡的均匀系统。沉积的能量最初仅沉积在电子子系统内，系统的后续演化由电子声子耦合的细节决定。在这里，我们通过多层布拉格衍射测量晶格参数的时间演化，并将结果与经典分子动力学模拟进行比较，以确定晶格温度。然后通过与两温度电子声子系统的演化进行比较来确定金的电子-离子耦合常数。
By irradiating a thin metal foil with an intense short-pulse laser, we have created a uniform system far from equilibrium. The deposited energy is initially deposited only within the electronic subsystem, and the subsequent evolution of the system is determined by the details of the electron-phonon coupling. Here, we measure the time evolution of the lattice parameter through multilayer Bragg diffraction and compare the result to classical molecular dynamic simulations to determine the lattice temperature. The electron-ion coupling constant for gold is then determined by comparison with the evolution of a two-temperature electron-phonon system.