# 2D electron gas in chalcogenide multilayers

## TL;DR

This paper explores the properties of two-dimensional electron gases in chalcogenide multilayer structures, focusing on quantum Hall effects, the influence of giant Zeeman splitting in magnetic semiconductors, and potential topological phases.

## Contribution

It provides new insights into how quantum Hall effects and topological phases manifest in chalcogenide multilayers with magnetic properties.

## Key findings

- Quantum Hall effect observed in chalcogenide multilayers.
- Giant Zeeman splitting significantly affects Landau level behavior.
- Potential emergence of novel topological phases in these structures.

## Abstract

Semiconductor interfaces, such as these existing in multilayer structures (e.g., quantum wells (QWs)), are interesting because of their ability to form 2D electron gases (2DEGs), in which charge carriers behave completely differently than they do in the bulk. As an example, in the presence of a strong magnetic field, the Landau quantization of electronic levels in the 2DEG results in the quantum Hall effect (QHE), in which Hall conductance is quantized. This chapter is devoted to the properties of such 2DEGs in multilayer structures made of compound semiconductors belonging to the class of Se- and Te-based chalcogenides. In particular, we will also discuss the interesting question of how the QHE phenomenon is affected by the giant Zeeman splitting characteristic of II-VI-based diluted magnetic semiconductors (DMSs), especially when the Zeeman splitting and Landau splitting become comparable. We will also shortly discuss novel topological phases in chalcogenide multilayers.