Transition of Graphene on a Substrate to a Semimetallic State

TL;DR

This paper investigates how the electronic state of graphene on a substrate transitions from a zero-gap semiconductor to a semimetallic state, using theoretical calculations of ground-state energy within the random-phase approximation.

Contribution

It provides a theoretical analysis of the transition in graphene's electronic properties on different substrates, highlighting the role of substrate material.

Findings

Graphene can transition to a semimetallic state depending on substrate.

Ground-state energy calculations support the transition mechanism.

Theoretical framework based on the random-phase approximation.

Abstract

Graphene on a substrate has been shown to exhibit a transition, depending on the substrate material, from a zero-gap semiconductor state to a semimetallic state. The ground-state energy of the electron (hole) gas has been calculated within the random-phase approximation.