Electron cyclotron mass in undoped CdTe/CdMnTe quantum wells

TL;DR

This study investigates how the electron cyclotron mass varies in undoped CdTe/(Cd,Mn)Te quantum wells, showing increased mass with reduced well width and supporting findings with model calculations.

Contribution

It provides experimental measurements of electron cyclotron mass in undoped quantum wells and compares them with theoretical models, highlighting the effects of quantum confinement.

Findings

Electron cyclotron mass increases as well width decreases.

Good agreement between experimental data and model calculations.

Electron-phonon coupling constant determined as 0.32.

Abstract

Optically detected cyclotron resonance of two-dimensional electrons has been studied in nominally undoped CdTe/(Cd,Mn)Te quantum wells. The enhancement of carrier quantum confinement results in an increase of the electron cyclotron mass from 0.099$m_0 $ to 0.112$m_0 $ with well width decreasing from 30 down to 3.6 nm. Model calculations of the electron effective mass have been performed for this material system and good agreement with experimental data is achieved for an electron-phonon coupling constant $\alpha $=0.32.