Topological phases of graphene-Kagome systems

TL;DR

This paper investigates the topological phases of graphene-Kagome systems, analyzing how electron-electron interactions influence their electronic and topological properties, with implications for spintronics and nanodevice engineering.

Contribution

It provides a comprehensive analysis of topological phases in graphene-Kagome lattices considering electronic correlations using Hubbard mean-field approximation.

Findings

Identification of metallic, trivial, and topological insulating phases in 2D graphene-Kagome lattices.

Phase diagrams showing the influence of energy coupling and electronic occupation.

Potential applications in spintronics and electronic transport devices.

Abstract

The growing skill in the synthesis processes of new materials has intensified the interest in exploring the properties of systems modeled by more complex lattices. Two-dimensional super-honeycomb lattices, have been investigated in metallic organic frameworks. They turned out as a significant route to the emergence of localized electronic responses, manifested as flat bands in their structure with topological isolating behavior. A natural inquiry is a complete analysis of their topological phases in the presence of electronic correlation effects. Here we analyse of the electron-electron correlation effects via Hubbard mean-field approximation on the topological phases of 2D and quasi-1D graphene-Kagome lattices. The 2D spin conductivity phase's diagrams describe metallic, trivial and topological insulating behaviors, considering different energy coupling and electronic occupations. Our results pave the way to smart-engineered nanostructured devices with relevant applications in spintronics and transport responses.