Comment on "Electron screening and excitonic condensation in double-layer graphene systems"

TL;DR

This paper examines how screening affects the condensed phase in bilayer graphene, finding minimal impact on transition temperature in strong interactions and predicting a first-order phase transition.

Contribution

It provides new insights into the role of screening in bilayer graphene and predicts a first-order phase transition, which contrasts with previous assumptions of continuous transitions.

Findings

Screening has little effect on the Kosterlitz-Thouless temperature in strong interactions.

The phase transition to the condensed state is predicted to be first order.

The study uses the Thomas Fermi approximation to analyze screening effects.

Abstract

The influence of screening on the condensed state of bilayer graphene is studied within the framework of the Thomas Fermi approximation. We find that screening has little effect on the Kosterlitz-Thouless temperature in the strongly interacting regime. Furthermore, we predict that the phase transition to the condensed state is first order.