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arXiv · 2206.10468

Non-uniform heat redistribution among multiple channels in the integer quantum Hall regime

Ryota Konuma·Chaojing Lin·Tokuro Hata·Taichi Hirasawa·Takafumi Akiho·Koji Muraki·Toshimasa Fujisawa
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Abstract

Heat transport in multiple quantum-Hall edge channels at Landau-level filling factor nu = 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 non-uniform, 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.

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Ryota Konuma, Chaojing Lin, Tokuro Hata, Taichi Hirasawa, Takafumi Akiho, Koji Muraki, Toshimasa Fujisawa. 2022-06-21. Non-uniform heat redistribution among multiple channels in the integer quantum Hall regime. https://doi.org/10.1103/physrevb.105.235302

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