Lifetimes of excited electrons in Fe and Ni: first-principles GW and the T-matrix theory.
Lifetimes of excited electrons in Fe and Ni: first-principles GW and the T-matrix theory.
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Fe 和 Ni 中激发电子的寿命：第一原理 GW 和 T 矩阵理论。
DOI：
10.1103/physrevlett.93.096401
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发表时间：
2004
影响因子：
8.6
通讯作者：
P. Echenique
中科院分区：
文献类型：
--
作者：
V. Zhukov;E. Chulkov;P. Echenique
我们提出了一个从头计算的结果，在铁磁材料中，结合非自旋翻转和自旋翻转过程中的GW和T-矩阵方法的激发电子寿命。我们开发的方法适用于低能电子激发铁和镍。结果表明，Fe中自旋波的产生实质上降低了自旋少数d态的寿命，而类自由电子自旋少数态和所有自旋多数态的寿命受自旋波产生的影响较小，Ni中自旋翻转散射对自旋少数d态寿命的影响较小. T矩阵非自旋翻转过程对自旋少数激发态的寿命有重要影响。
We present the results of an ab initio calculation of excited electron lifetimes in ferromagnetic materials which incorporates non-spin-flip and spin-flip processes within GW and T-matrix approaches. The method we develop is applied to low-energy electron excitations in Fe and Ni. It is found that the spin-wave generation in Fe essentially reduces the lifetimes of the spin-minority d states whereas the free-electron-like spin-minority states and all the spin-majority states are affected much less. The influence of spin-flip scattering on the lifetimes in Ni appears to be weak. The T-matrix non-spin-flip processes are important for the lifetimes of excited spin-minority states.