Anomalous quasiparticle lifetime in graphite: band structure effects.
Anomalous quasiparticle lifetime in graphite: band structure effects.
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石墨中的反常准粒子寿命：能带结构效应。
DOI：
10.1103/physrevlett.87.246405
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发表时间：
2001
影响因子：
8.6
通讯作者：
S. Louie
中科院分区：
文献类型：
--
作者：
C. Spataru;M. Cazalilla;Á. Rubio;L. Benedict;P. Echenique;S. Louie
我们报道了由GW近似下的自能算符虚部确定的准粒子在石墨中的寿命的从头计算。在费米能级以上0.5-3.5 eV能量范围内的反寿命与费米液体理论天真地预期的二次型行为有很大的偏离。根据这种材料的能带结构的独特特征，解释了这些偏差。我们还对不同组别的实验结果进行了讨论，并对未来的实验进行了预测。
We report ab initio calculations of quasiparticle lifetimes in graphite, as determined from the imaginary part of the self-energy operator within the GW approximation. The inverse lifetime in the energy range from 0.5 to 3.5 eV above the Fermi level presents significant deviations from the quadratic behavior naively expected from Fermi liquid theory. The deviations are explained in terms of the unique features of the band structure of this material. We also discuss the experimental results from different groups and make some predictions for future experiments.