# Quantum Hall effect of Dirac fermions on the surface of a topological insulator

## TL;DR

This paper investigates the quantum Hall effect of Dirac fermions on the surface of topological insulators, showing surface states persist under strong magnetic fields and analyzing the impact of symmetry-breaking perturbations.

## Contribution

It provides new insights into the behavior of surface states in topological insulators under strong magnetic fields and symmetry-breaking effects.

## Key findings

- Surface states survive strong magnetic fields.
- Landau levels are affected by symmetry-breaking perturbations.
- Surface quantum Hall effect persists despite bulk symmetry breaking.

## Abstract

We study the quantum Hall effect of Dirac fermions on the surface of a Wilson-Dirac type topological insulator thin film in the strong topological insulating phase. Although a magnetic field breaks time reversal symmetry of the bulk, the surface states can survive even in a strong field regime. We examine how the Landau levels of the surface states are affected by symmetry breaking perturbations.