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arXiv 0810.2450cond-mat.str-el
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二维电子气的重整化因子和有效质量

Renormalization factor and effective mass of the two-dimensional electron gas

Markus Holzmann, Bernard Bernu, Valerio Olevano, Richard M. Martin, David M. Ceperley

摘要:

我们计算的费米液相的均匀,二维电子气的动量分布。我们发现,接近费米面,有限系统的动量分布与$N$电子慢慢接近其热力学极限,与领先的阶校正标度为$N^{-1/4}$。这些修正支配着重整化因子$Z$和单粒子有效质量$m^*$外推到无限系统尺寸的过程。我们展示了如何收敛可以提高分析。在$1 \le r_s \le 10$范围内,我们得到了较低的重整化因子$Z$和较高的有效质量,$m^*>m$,相比微扰RPA值。

英文摘要:

We calculate the momentum distribution of the Fermi liquid phase of the homogeneous, two-dimensional electron gas. We show that, close to the Fermi surface, the momentum distribution of a finite system with $N$ electrons approaches its thermodynamic limit slowly, with leading order corrections scaling as $N^{-1/4}$. These corrections dominate the extrapolation of the renormalization factor, $Z$, and the single particle effective mass, $m^*$, to the infinite system size. We show how convergence can be improved analytically. In the range $1 \le r_s \le 10$, we get a lower renormalization factor $Z$ and a higher effective mass, $m^*>m$, compared to the perturbative RPA values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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