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Theoretical study of quasiparticle inelastic lifetimes as applied to aluminum

机译:铝的准粒子非弹性寿命的理论研究

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摘要

We present a comparative analysis of different microscopic approaches to quasiparticle properties in metals. Aluminum is chosen as an application object, since it exhibits characteristics many of which are well-described in the jellium model. Within this model, we consider how different levels of physical elaboration of the electron-electron interaction affect the imaginary part of the quasiparticle self-energy and the quasiparticle renormalization constant. Also, we present ab initio calculations of the quasiparticle lifetime in crystalline aluminum with the use of both the linear muffin-tin orbital method and the plane-wave pseudopotential theory. To complete the picture of inelastic scattering effects in aluminum, we report first-principles calculations on electron-phonon interaction and on the phonon mediated contribution to the lifetime. The total inelastic lifetime broadening is compared with experimental data known from the literature.
机译:我们提出了对金属准粒子特性的不同微观方法的比较分析。选择铝作为应用对象是因为铝具有许多特性,这些特性在凝胶模型中得到了很好的描述。在该模型中,我们考虑不同程度的电子-电子相互作用的物理精细化如何影响准粒子自能的虚部和准粒子重新归一化常数。此外,我们同时使用线性松饼-锡轨道方法和平面波pseudo势理论,从头计算了铝中准粒子的寿命。为了完成铝中非弹性散射效应的图片,我们报告了关于电子-声子相互作用以及声子对寿命的贡献的第一性原理计算。将总的非弹性寿命变宽与文献中已知的实验数据进行比较。

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