Quantum lifetime of 2D electron in magnetic field

TL;DR

This paper measures the quantum lifetime of 2D electrons in GaAs quantum wells under magnetic fields across a wide temperature range, confirming theoretical predictions of electron-electron scattering effects.

Contribution

It provides experimental data on electron lifetime in 2D systems in magnetic fields, validating existing theoretical models over a broad temperature spectrum.

Findings

Electron lifetime decreases with temperature as predicted by theory

Good agreement between experimental data and electron-electron scattering models

Transport method effectively measures quantum lifetime in 2D electron systems

Abstract

The lifetime of two dimensional electrons in GaAs quantum wells, placed in weak quantizing magnetic fields, is measured using a simple transport method in broad range of temperatures from 0.3 K to 20 K. The temperature variations of the electron lifetime are found to be in good agreement with conventional theory of electron-electron scattering in 2D systems.