Correlation induced switching of local spatial charge distribution in two-level system

TL;DR

This paper theoretically investigates how strong Coulomb correlations induce spatial charge redistribution and inverse occupation in a two-level nanoscale system, revealing conditions for charge manipulation.

Contribution

It introduces a theoretical analysis of Coulomb correlation effects on charge distribution and occupation in a two-level system, highlighting the potential for charge control.

Findings

Coulomb correlations cause spatial charge redistribution.

Inverse occupation of levels can be achieved under certain biases.

Charge manipulation possibilities are discussed.

Abstract

We present theoretical investigation of spatial charge distribution in the two-level system with strong Coulomb correlations by means of Heisenberg equations analysis for localized states total electron filling numbers taking into account pair correlations of local electron density. It was found that tunneling current through nanometer scale structure with strongly coupled localized states causes Coulomb correlations induced spatial redistribution of localized charges. Conditions for inverse occupation of two-level system in particular range of applied bias caused by Coulomb correlations have been revealed. We also discuss possibility of charge manipulation in the proposed system.