The 81st JSAP Autumn Meeting, 2020

Presentation information

Oral presentation

13 Semiconductors » 13.6 Nanostructures, quantum phenomena, and nano quantum devices

[8p-Z10-1~11] 13.6 Nanostructures, quantum phenomena, and nano quantum devices

Tue. Sep 8, 2020 1:00 PM - 4:00 PM Z10

Toshihiro Nakaoka(Sophia Univ.), Ryuichi Ohta(NTT)

1:00 PM - 1:15 PM

[8p-Z10-1] [Highlight]Electron and lattice cooling in thermionic emission heterostructures with tilted barriers

Marc Bescond1, Aymen Yangui1, Xiangyu Zhu2, Naomi Nagai2, Kazuhiko Hirakawa2,1 (1.LIMMS/CNRS-IIS, Univ. of Tokyo, 2.IIS and INQIE, Univ. of Tokyo)

Keywords:Thermionic and evaporative cooling, Double-barrier heterostructure, Quantum transport

We focus on innovative highly efficient thermionic cooling nano-devices. It is motivated by the urgent technological need to control joule heating in nanoelectronics in a context of energy shortage. We first study both theoretically and experimentally a double-barrier asymmetric hetero-structure and demonstrate that such device can efficiently acts on both electronic and phononic bath’s refrigeration. A remarkable electron refrigeration of 50 K, thanks to an evaporative cooling effect, is analyzed. We then introduce an original refrigeration device with a tilted potential barrier, and discuss the improvement of performances. Our results show that the present semiconductor heterostructure can lead to thermionic devices of crucial technological interest, providing a higher efficiency and a larger cooling power.