The two-dimensional homogeneous electron gas (2D HEG) is a prototype system of fundamental interest that can be realized experimentally over a wide range of densities. Here, we investigate its collective charge excitations at low densities, using time-dependent density functional theory. We demonstrate that, beyond tra...
Jakob Wolff, S. Botti, Lucia Reining et al.· Physical review B· 0 citations
The local field factor $G(q)$ of the HEG describes how exchange and correlation modify the response to a static perturbation, and enters dielectric screening, effective electron--electron interactions, and the xc kernel of TDDFT. Accurate zero-temperature data for $G(q)$, however, remain limited to metallic densities,...
Muhammed H. Güneş, Y. Yang, V. Gorelov et al.· 0 citations
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 fac...
Muhammed H. Güneş, Y. Yang, V. Gorelov et al.· 1 citation· ⚡1
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