Spin-dependent correlation in two-dimensional electron liquids at arbitrary degeneracy and spin-polarization: CHNC approach

TL;DR

This paper uses the CHNC approach to study spin-dependent correlations in 2D electron liquids across various temperatures and spin-polarizations, revealing temperature effects and phase behavior up to Wigner crystallization.

Contribution

It applies the classical mapping technique to 2D electron systems at arbitrary degeneracy and spin-polarization, providing detailed thermodynamic and structural properties.

Findings

Finite temperature effects are significant at high densities for T/ T_F >= 1.

The electron system remains paramagnetic until Wigner crystallization density.

Results show similarities between 2D and 3D electron systems in physical property dependencies.

Abstract

We apply the classical mapping technique developed recently by Dharma-wardana and Perrot for a study of the uniform two-dimensional electron system at arbitrary degeneracy and spin-polarization. Pair distribution functions, structure factors, the Helmhotz free energy, and the compressibility are calculated for a wide range of parameters. It is shown that at low temperatures T/ T_F <0.1, T_F being the Fermi temperature, our results almost reduce to those of zero-temperature analyses. In the region T/ T_F >= 1, the finite temperature effects become considerable at high densities for all spin-polarizations. We find that, in our approximation without bridge functions, the finite temperature electron system in two dimensions remains to be paramagnetic fluid until the Wigner crystallization density. Our results are compared with those of three-dimensional system and indicated are the similarities in temperature, spin-polarization, and density dependencies of many physical properties.