Dynamical bistability in quantum dot structures: The role of Auger processes

TL;DR

This paper investigates bistability in quantum dot structures using a drift-diffusion model, highlighting the significant role of Auger processes and demonstrating long switching times consistent with experimental observations.

Contribution

It introduces a dynamic model combining electron capture/emission with Auger processes to explain quantum dot bistability and long switching times.

Findings

Simulations show switching times of months.

Results align with experimental data.

Auger processes are crucial for bistability.

Abstract

Bistability in quantum dot structures is examined by a drift-diffusion model in combination with electron capture and emission processes. Our simulations provide a dynamic scenario with extremely long switching times of the order of months and the results are in good agreement with the experimental findings of Yusa and Sakaki [Appl. Phys. Lett. {\bf 70}, 345 (1997)]. The analysis of the data supports the importance of Auger capture processes for quantum dots.