ELECTRON-DIFFUSION IN METALS STUDIED BY PICOSECOND ULTRASONICS
ELECTRON-DIFFUSION IN METALS STUDIED BY PICOSECOND ULTRASONICS
复制标题
DOI：
10.1103/physrevb.49.15046
复制
发表时间：
1994-06-01
影响因子：
3.7
通讯作者：
MARIS, HJ
中科院分区：
文献类型：
--
作者：
TAS, G;MARIS, HJ
我们研究了皮秒光脉冲被金属薄膜吸收时产生的超声波脉冲。脉冲形状受热电子在失去能量到晶格之前扩散的距离的影响。我们表明，这种方法可以用来测试理论的电子-声子和电子-电子散射率。计算结果与考虑了电子分布的非热特性的计算结果吻合得很好。
We have studied the ultrasonic pulses that are generated when a picosecond light pulse is absorbed in a metallic film. The pulse shape is influenced by the distance that the hot electrons diffuse before losing their energy to the lattice. We show that this method can be used to test theories of the electron-phonon and electron-electron scattering rates. The results are in excellent agreement with a calculation in which the nonthermal character of the electron distribution is taken into account.