Fig. 1: Formation of a Chern junction.
From: The experimental demonstration of a topological current divider
a Chern insulators with \(C=1\) corresponding to the clockwise chirality and \(C=-1\) corresponding to the counterclockwise chirality. The edge mode chirality is controlled by an external magnetic field. b Chirality depends on the material thickness. A thinner flake hosts a chiral edge mode with \(C=1\), while a thicker flake presents two chiral edge modes with \({C}=2\). A Chern junction is formed in flakes with an appropriate step in thickness. c The picture shows schematically two of the possible scenarios for the chiral edge states at the junction.
