High Temperature Superfluidity in Double Bilayer Graphene

TL;DR

This paper predicts that high-temperature superfluidity of electron-hole pairs can be achieved in double bilayer graphene, with transition temperatures above liquid helium temperatures, using existing graphene device technology.

Contribution

It demonstrates the feasibility of realizing high-temperature superfluidity in double bilayer graphene, a novel approach leveraging existing device parameters.

Findings

Superfluidity predicted at temperatures above liquid helium levels.

Atomically thin bilayer graphene can host electron-hole superfluidity.

Existing graphene devices can be used to realize this superfluid state.

Abstract

Exciton bound states in solids between electrons and holes are predicted to form a superfluid at high temperatures. We show that by employing atomically thin crystals such as a pair of adjacent bilayer graphene sheets, equilibrium superfluidity of electron-hole pairs should be achievable for the first time. The transition temperatures are well above liquid helium temperatures. Because the sample parameters needed for the device have already been attained in similar graphene devices, our work suggests a new route towards realizing high-temperature superfluidity in existing quality graphene samples.