Fig. 4: Robustness of the chiral edge current divider to temperature.
From: Topological current divider in a Chern insulator junction
a Device 2 measurement scheme. Domains I and II are tuned to Chern numbers of 1 and 2, respectively. Current is injected at contact 1 (gray arrow) and detected at contacts 6 (black) and 10 (red). Winding of edge states is clockwise at μ0H = −9 T. Yellow shaded area denotes the gate range where Chern insulator junction forms and functions as a 1:1 current divider. b Normalized drain current versus Vbg for contacts 6 and 10 at μ0H = −9 T, T = 10 K. Blue line denotes 50%, corresponding to perfect current division at the Chern insulator junction. Black lines denote 45% and 55%. c 2D color map of normalized current from contact 1 to contact 6: I6/(I6 + I10). Dashed line corresponds to 5% deviation from equal current division. Inset—optical micrograph of Device 2.
