Nonuniform heat redistribution among multiple channels in the integer quantum Hall regime

Heat transport in multiple quantum Hall edge channels at Landau-level filling factors v = 2, 4, and 8 is investigated with a quantum point contact as a heat generator and a quantum dot as a local thermometer. Heat distribution among the channels remains highly nonuniform, which can be understood with the plasmon eigenmodes of the multiple channels. The heat transport can be controlled with another quantum point contact as a quantized heat valve, as manifested by stepwise increases of heat current at the thermometer. This encourages developing integrated heat circuits with quantum Hall edge channels.

Automated summary

This study investigates heat transport in multiple quantum Hall edge channels at Landau-level filling factors v = 2, 4, and 8. The heat distribution among the channels remains highly nonuniform and can be explained by the plasmon eigenmodes. The heat transport can be controlled with a quantized heat valve, as evidenced by stepwise increases of heat current at the local thermometer.