The Influence of Remote Bands on Exciton Condensation in Double-Layer Graphene

TL;DR

This paper investigates how remote electronic bands affect exciton condensation in double-layer graphene, highlighting their supportive role at low carrier densities and discussing challenges in estimating condensation temperatures.

Contribution

It reveals the significant influence of remote bands on exciton condensation in double-layer graphene, a factor often overlooked in prior models.

Findings

Remote bands support exciton formation at low densities

Challenges in quantitatively estimating condensation temperatures

Remote bands' role is crucial in exciton physics of graphene

Abstract

We examine the influence of remote bands on the tendency toward exciton condensation in a system consisting of two parallel graphene layers with negligible interlayer tunneling. We find that the remote bands can play a crucial supporting role, especially at low carrier densities, and comment on some challenges that arise in attempting quantitative estimates of condensation temperatures.