Frohlich mass in GaAs-based structures

TL;DR

This paper investigates the Frohlich interaction and polaron mass in doped GaAs quantum wells through infrared magneto-absorption experiments, challenging the traditional understanding of these phenomena in real systems.

Contribution

It provides new experimental insights questioning the applicability of the Frohlich interaction concept in doped GaAs structures.

Findings

Infra-red magneto-absorption measurements conducted on GaAs quantum wells.

Results question the validity of the Frohlich interaction concept in real systems.

Experimental data suggest revisions to the polaron mass understanding.

Abstract

The Frohlich interaction is one of the main electron-phonon intrinsic interactions in polar materials originating from the coupling of one itinerant electron with the macroscopic electric field generated by any longitudinal optical (LO) phonon. Infra-red magneto-absorption measurements of doped GaAs quantum wells structures have been carried out in order to test the concept of Frohlich interaction and polaron mass in such systems. These new experimental results lead to question the validity of this concept in a real system.