Spin correlations and spin-density wave phase in a finite-temperature quasi-one-dimensional electron gas.

In this paper, we theoretically investigate the effect of temperature on spin correlations in an unpolarized quasi-one-dimensional electron gas (Q1DEG). The correlations are treated dynamically within quantum version of the self-consistent mean-field approach of SingwiNumerical results for the ↑↑ and ↑↓ components of static structure factor and pair-correlation function, and the wave vector dependent static spin and charge susceptibilities are presented over a wide range of temperatureand electron coupling. We find that the recently reported (2020335403) non-monotonic-dependence of the contact pair-correlation function(= 0;) is driven primarily by an interplay between ↑↓ correlations and thermal effects.

Dynamic correlation effects on correlational properties of finite-temperature quasi-one-dimensional electron gas.

We have studied correlational properties of quasi-one-dimensional electron gas at finite temperatureby incorporating the dynamics of electron correlations within the quantum version of the self-consistent mean-field approach of Singwi, Tosi, Land, and Sjölander. Static structure factor, pair-correlation function, static density susceptibility, excess kinetic energy, and free correlation energy are calculated covering a wide range of temperature and electron number density. As at absolute zero temperature, the inclusion of dynamics of correlations results in stronger spatial electron correlations, with a pronounced peak in the static structure factor at wave vector∼ 3.

Confinement and correlation effects on plasmons in an atom-scale metallic wire.

We have studied the effect of confinement and correlations on the plasmon dispersion in an atom-scale metallic wire by determining the electron density response function. The wire electrons are modelled as comprising a quasi-one-dimensional homogeneous gas, with different transverse confinement models. The response function is calculated by including electron correlations beyond the random-phase approximation within the self-consistent mean-field approach of Singwi et al (1968 Phys.