Electrometry using the quantum Hall effect in a bilayer 2D electron system

TL;DR

This paper presents a sensitive electrometer based on the quantum Hall effect in a bilayer 2D electron system, demonstrating precise measurements of Landau level evolution and effective mass in GaAs.

Contribution

It introduces a novel electrometer utilizing quantum Hall effects in bilayer 2DEG systems for high-precision electric field measurements.

Findings

Measured Landau level evolution with high sensitivity

Extracted electron effective mass consistent with previous data

Demonstrated potential for precise electrometry in 2D systems

Abstract

We discuss the development of a sensitive electrometer that utilizes a two-dimensional electron gas (2DEG) in the quantum Hall regime. As a demonstration, we measure the evolution of the Landau levels in a second, nearby 2DEG as the applied perpendicular magnetic field is changed, and extract an effective mass for electrons in GaAs that agrees within experimental error with previous measurements.