Temperature dependence of exciton Auger decay process in Cuprous Oxide

TL;DR

This paper investigates how the Auger decay rate of excitons in Cuprous Oxide varies with temperature, combining theoretical and experimental approaches across a broad temperature range, revealing a linear increase above 100 Kelvin.

Contribution

It provides the first comprehensive analysis of temperature effects on exciton Auger decay in Cuprous Oxide, combining theory and experiment.

Findings

Auger constant increases linearly above 100 Kelvin

Experimental and theoretical results are consistent

Temperature dependence impacts Bose condensation experiments

Abstract

We report theoretical and experimental study on Auger decay of excitons in Cuprous Oxide in a wide range of temperatures, from 2 Kelvin to 325 Kelvin, in single-photon surface excitation. We find that the Auger constant linearly increases with temperature above 100 Kelvin. This constant is important for experiments on Bose condensation of excitons.