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arXiv 2609.10006physics.comp-phcond-mat.str-el

三维电子气静态响应中短程有序的签名

Signature of Short-Range Order in Static Response of the Three-Dimensional Electron Gas

  • École Polytechnique, Institut Polytechnique de Paris(巴黎综合理工学院,巴黎理工学院)
  • CNRS(法国国家科学研究中心)
  • CEA(法国原子能和替代能源委员会)
  • Flatiron Institute(平顿研究所)
  • Hofstra University(霍夫斯特拉大学)
  • Synchrotron SOLEIL(SOLEIL同步辐射光源)

机构由 AI 辅助整理,请以论文原文为准。

Muhammed H. Güneş, Yubo Yang, Vitaly Gorelov, Miguel A. Morales, Matteo Gatti, Lucia Reining, Shiwei Zhang

AI总结:

利用扩散蒙特卡洛计算三维电子气的静态局域场因子,发现中等波矢处的结构为短程有序的指纹,并给出全液相参数化,预测低能共振模式。

AI中文摘要:

三维电子气是凝聚态物理和量子化学中的基本模型,由其推导出的交换关联能是材料从头算计算的起点。然而,波矢相关的响应,即静态局域场因子$G(q)$,在强耦合区域中三十年来一直缺乏精确的基态基准。利用扩散蒙特卡洛方法,我们计算了液相中的$G(q)$和静态密度-密度响应函数,并发现$G(q)$在中等波矢处存在显著结构,该结构在金属密度下已可见,并随相互作用强度的增加而增强。我们通过证明该结构是重现静态结构因子所必需的,将其识别为短程有序的指纹。我们的参数化在整个液相中有效,并预测了粒子-空穴连续谱内的低能共振模式。

英文摘要:

The three-dimensional electron gas is a fundamental model in condensed matter physics and quantum chemistry, and the exchange-correlation energy derived from it serves as the starting point of \textit{ab initio} computations of materials. However, the wave-vector-dependent response, and hence the static local field factor $G(q)$, has remained without accurate ground-state benchmark in the strongly coupled regime for three decades. Using diffusion Monte Carlo, we calculate $G(q)$ and the static density-density response function across the liquid phase and find a pronounced structure in $G(q)$ at intermediate wave vectors, already visible at metallic densities and growing with increasing interaction strength. We identify it as a fingerprint of short-range order by showing that it is required to reproduce the static structure factor. Our parametrization, valid in the entire liquid phase, predicts a low-energy resonant mode inside the particle-hole continuum.

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