Combined effects of disorders and electron-electron interactions upon metal-insulator transition in 2D non-bipartite lattice

TL;DR

This paper investigates how disorders and electron-electron interactions jointly influence the metal-insulator transition in a 2D non-bipartite lattice, revealing a reentrant insulating phase at higher interaction strengths.

Contribution

It introduces a combined analysis of disorder and interactions on the metal-insulator transition using real-space renormalization and finite-size scaling.

Findings

Disordered system transitions from insulator to metal.

Further increase in interactions causes reentrant insulating behavior.

Reentrant transition is characterized by specific scaling properties.

Abstract

We examined the characteristics of a metal-insulator transition on a two-dimensional non-bipartite lattice when both disorders and electron interactions are present. Using a real-space renormalization group method and finite-size scaling analysis we have found that after the disordered system transits from the insulating state to the metal one, it can reenter an insulating state if there is a further increase in the electron-electron interactions.