Theory of condensation of indirect excitons in a trap

TL;DR

This paper presents a theoretical model for the condensation of indirect excitons in a trap, emphasizing the impact of screening effects on the condensation process in a GaAs/AlGaAs quantum well system.

Contribution

It introduces a new theoretical framework that accounts for screening effects on exciton condensation in electrostatic traps, applied to specific quantum well structures.

Findings

Condensation temperature estimated at hundreds of milliKelvin.

Screening significantly influences the exciton condensation process.

Model aligns with previous experimental observations.

Abstract

We present theoretical studies of condensation of indirect excitons in a trap. Our model quantifies the effect of screening of the trap potential by indirect excitons on exciton condensation. The theoretical studies are applied to a system of indirect excitons in a GaAs/AlGaAs coupled quantum well structure in a diamond-shaped electrostatic trap where exciton condensation was studied in earlier experiments. The estimated condensation temperature of the indirect excitons in the trap reaches hundreds of milliKelvin.