About the $sigma_{xy}$ in the integer quantum Hall effect (or quantum anomalous Hall effect)

Physics Asked by fbs147 on November 16, 2020

We know that $sigma_{xy}$ in the integer quantum Hall effect (or quantum anomalous Hall effect) can be calculated by the Berry curvature, but we also know that $sigma_{xy}$ is calculated by the properties of the body!

Why it can be explained as edge state to some extent? I know edge-boundary correspondence, but what is the physics in it? I hope that is a elegant explanation about that.

condensed matter quantum hall effect topological insulators topology

About the $sigma_{xy}$ in the integer quantum Hall effect (or quantum anomalous Hall effect)

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